2.0.0

-----

Upgrade to Ansible 2.3.x, minor bug fixes and updates needed for the upgrade.

Breaking changes:

* Switched to Ansible 2.3.x, removing support for Ansible 1.9.x. All

  documentation has been updated.

* Due to switch to Ansible 2.x which is more restrictive when deploying code on

  remote server, it is now necessary to use one of the methods listed in

  `Ansible documentation

  <https://docs.ansible.com/ansible/latest/become.html#becoming-an-unprivileged-user>`_

  if connecting to remote server as user other than ``root``. Easiest fix is to

  enable ``pipelining``. Tests have been already updated to take advantage of

  this.

* ``ldap_server`` role

   * Renamed ``ldap_entry`` module to ``m_ldap_entry`` to avoid collision with

     official module.

   * Renamed ``ldap_permissions`` module to ``m_ldap_permissions`` to be

     consistent and to avoid potential future collisions with official module

     names.

* ``wsgi_website`` role

   * Removed handler with parametrised name used for restarting the web

     service. Dependent roles should instead define their own handlers from now

     on.

New features/improvements:

* Updated documentation to refer to Debian Jessie documentation where necessary.

* ``ldap_server`` role

  * Updated tests to be more resilient to ordering changes.

* ``mail_forwarder`` role

  * Updated tests to be more resilient to ordering changes and time races.

* ``backup_client`` role

  * Switched to using the ``file`` module when cleaning-up GnuPG backup keyring,

    which should make it more robust..

Bug-fixes:

* Updated pip requirements and its input file to include ``python-vagrant``

  (needed for Molecule tests).

* Updated handling of key ID extraction for OpenPGP keys in order for it to work

  with Ansible 2.x.

* Updated usage instructions in order to be able to install The Bug Genie via

  script, and added missing instructions for creating one of the directories for

  the demo wiki role (``handlers`` directory).

* All roles

  * Updated test playbooks to avoid idempotence test failures due to apt cache

    updates.

* ``backup_client`` role

  * Fixed scenario in which backup keys could not be properly replaced on Debian

    Stretch machines (due to more up-to-date version of GnuPG compared to Debian

    Jessie).

* ``common`` role

  * Fixed handling of complex version specifications when installing packages

    via pip. Needed for Ansible 2.x.

* ``wsgi_website`` role

  * Fixed handling of complex version specifications when installing packages

    via pip. Needed for Ansible 2.x.

  * Fixed erroneous calculation of adminstrator username in internal

    defaults parameter.