MAR-218: Rework/improve code for setting LDAP server admin password:

- Avoid dropping temporary file with password by invoking a search on
the LDAP server using the supplied credentials.
- Do not log sensitive informationi when setting the LDAP server admin
password.

MAR-218: Switch to using task imports instead of includes:

- Should result in somewhat faster run, except the includes happen
during planning phase. None of the changed includes will have
problem with this.
- Solves the issue of (included) imported tasks not being tagged
properly, particularly in relation to the mechanism for explicitly
running all handlers.

MAR-218: Switch to using ldap_attrs module:

- Update invocations and syntax.
- Drop the workaround for configuring TLS on the LDAP server (should
be possible to set all relevant attributes at the same time at this
point).
- Group some invocations where it makes sense.

MAR-218: Switch to using fully-qualified collection names for all tasks:

- Ensures there is no ambiguity when invoking a module.

MAR-218: Quote all octal values in YAML files:

- Fixes linting errors, and ensures there is no ambiguity in case of
YAML specification changes.

MAR-218: Fix linting errors related to commands doing unconditional changes:

- Tasks run during the prepare stage of test runs do not matter.
- Some of the role tasks are already effectively running only when
change _will_ happen (when it is detected via variable registered by
a previous task).

MAR-218: Update noqa directives for ansible-lint to use text tags:

- Numeric tagging is deprecated.

MAR-218: Fix include invocations:

- The old include keyword/task has been deprecated in favour of more
explicit include_tasks one.

MAR-239: Dropped support for Debian 11 Bullseye from the ldap_server role:

- Debian 12 Bookworm and upwards no longer install/configure rsyslog
by default, drop the related tests, tasks, and configuration files.

MAR-192: Drop rsyslog/logrotate configuration for ldap_server role under Debian 12 Bookworm:

- Default installations of Debian 12 Bookworm no longer come with
rsyslog pre-installed (and it is considered to be deprecated as
default system logger under Debian 12 Bookworm).

MAR-189: Refactored admin acocunt handling in the ldap_server role:

- Get rid of the admin entry from the directory, and resort to using
the directory's olcRootDN/olcRootPW attributes instead. Aligns
Buster package deployment with Bullseye one, as implemented via fix
for the following Debian bug:

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=821331

- Add the helper filter plugin to deal with calculating the salted
SHA1 checksum.
- Drop the architecture from Molecule instance names.
- Move the IPs around a tiny bit for Molecule instances.

MAR-165: Deploy Diffie-Helman parameters for LDAP server in the ldap_server role:

- Not relevant for Debian Strech because of a bug in the OpenLDAP
version it ships with.
- This should allow use of DHE ciphers with LDAP server.
- Generated DH parameters only help pick one of the parameters from
RFC-7919 (based on the size of generated ones).
- Make the cipher test lists distro-specific due to differences
between supported algorithms in respective GnuTLS versions.

MAR-151: Drop rcconf workaround:

- The workaround was needed on Debian Jessie because the systemctl
is-enabled command did not behave correctly for SysV init scripts.
- Drop the installation of the rcconf package.
- Use the "enabled" parameter in service module instead.

MAR-163: Reformat multiple skip-QA directives and remove some unnecessary ones:

- Update codes used to identify the disabled QA checks.
- Switch to using new syntax that disables only a specific QA check
instead of all of them on a single task.
- Drop disabling QA checks related to octal file permissions (this was
most likely bug in older versions of ansible-lint).

MAR-148: Fixing linting errors:

- Do not compare against booleans when value is already boolean in
"when" conditions.
- Use pipefail in conjunction with setting the shell to Bash when
extracting the backup encryption key IDs.
- Do not compare variables to empty strings in "when" conditions. This
change currently works only for complex variables (stuff can break
badly in case of simple variables in current default Ansible
configuration).
- Fix missing space in one of Jinja2 templates.

MAR-135: Switch to using run_handlers instead of handlers as variable:

- Updated all roles to now depend on run_handlers being set to True in
order to force execution of handlers.

MAR-129: Removed m_ldap_entry module:

- Removed the custom m_ldap_entry module used for managing LDAP
entries.
- Replaced the module usage with official ldap_entry and ldap_attr
modules.
- Updated role reference documentation.
- Updated usage instructions since we can't misuse the m_ldap_entry
any longer for adding members to groups.

MAR-129: Fixed deprecation of check_invalid_arguments in m_ldap_entry:

- Updated the module itself.
- Updated the ldap_server tasks.

MAR-129: Updated ldap_server role for new Molecule and Ansible:

- Fixed syntax warnings.
- Moved test playbook variables into group_vars.
- Optimised the invocation of test playbook.
- Remove the 'ss' utility from test machines in order to properly test
the unix sockets.
- Fixed how the hosts are being referenced in tests.

MAR-117: Renamed ldap_entry and ldap_permissions modules:

- Renamed ldap_entry module to m_ldap_entry.
- Renamed ldap_permissions module to m_ldap_permissions.
- Renames done to avoid collisions with official modules (at least for
ldap_entry).

MAR-114: Updated task syntax for ldap roles:

- Updated ldap_client and ldap_server roles.
- Added and removed quoting where it makes sense.
- Switched to using expanded syntax (instead of one-liners).

MAR-26: Implemented tests and fixes ldap_server role:

- Use static network configuration in order to make it easier to test
connectivity from dedicated client.
- Added client machine for testing firewall.
- Added missing LDAP client configuration on instance used for testing of
mandatory options.
- Fixed name of server for backup testing purposes.
- Expanded a bit the cipher configuration for LDAP server for testing optional
parameters.
- Fixed wrongly populated Debian selections setting for LDAP organisation.
- Use templates for deploying LDAP TLS keys and certificates in order to avoid
Ansible munching the TAB characters.
- Implemented tests covering fully functionality of the role.

MAR-26: Implemented scaffolding for testing the ldap_server role:

- Fixed role documentation and example for the ldap_server ldap_entries
parameter.
- Fixed missing leading zero when setting mode for deployed files.
- Marked certain tasks for skipping Ansible linting on.
- Fixed invocation of local LDAP commands to use unix socket out of the
box (don't depend on LDAP client configuration).
- Default to state 'present' for ldap_entry (makes things a bit more
readable/clear).
- Added test data for backup and TLS.
- Added dummy default test file.