Remove dependency on python2_lxc git source

The git source for python2_lxc was necessary before the package was
available on pypi, which it now is:
 - https://pypi.python.org/pypi/lxc-python2

This patch removes the py_from_git role dependency from the
lxc_hosts playbook, the role from the required roles list and the
repo details from the repo_packages as none of these are required.

Change-Id: Ia32665c9507b3a80096b201067f5329a1c3533fb

ansible-role-requirements.yml

@@ -36,10 +36,6 @@
   src: https://git.openstack.org/openstack/openstack-ansible-pip_lock_down
   scm: git
   version: master
-- name: py_from_git
-  src: https://git.openstack.org/openstack/openstack-ansible-py_from_git
-  scm: git
-  version: master
 - name: rsyslog_client
   src: https://git.openstack.org/openstack/openstack-ansible-rsyslog_client
   scm: git

playbooks/defaults/repo_packages/python2_lxc.yml

@@ -1,19 +0,0 @@
----
-# Copyright 2014, Rackspace US, Inc.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-## Git Source for python2-lxc library
-git_repo: https://github.com/lxc/python2-lxc
-git_install_branch: 0553f05d23b56b59bf3015fa5e45bfbfab9021ef # HEAD of "master" as of 17.01.2016
-git_dest: "/opt/lxc_python2_{{ git_install_branch|replace('/', '_') }}"

playbooks/lxc-hosts-setup.yml

@@ -19,7 +19,6 @@
   user: root
   roles:
     - { role: "lxc_hosts", tags: [ "lxc-host", "host-setup" ] }
-    - { role: "py_from_git", tags: [ "lxc-libs" ] }
     - role: "rsyslog_client"
       rsyslog_client_log_rotate_file: lxc_log_rotate
       rsyslog_client_log_dir: "/var/log/lxc"
@@ -27,5 +26,3 @@
       tags:
         - "lxc-rsyslog-client"
         - "rsyslog-client"
-  vars_files:
-    - defaults/repo_packages/python2_lxc.yml

releasenotes/notes/python2-lxc-git-removal-5d20c07d80aaa75b.yaml

@@ -0,0 +1,9 @@
+---
+upgrade:
+  - The git source for python2_lxc was used in the past as the package was not
+    available on pypi. Now that the package
+    `has been published <https://pypi.python.org/pypi/lxc-python2>`_ the
+    `py_from_git` role dependency has been removed from the `lxc_hosts`
+    playbook, the role has been removed from the required roles list and the
+    repo details have been removed from the repo_packages files as none of
+    these details are required any more.