Implement 16.04 support in Keystone

This change creates a ubuntu 16.04 variable file that will allow
the role to be executed against a ubuntu 16.04 host.

Change-Id: Ib6d7e68133de8d10b81d9116b74dca1de7568897
Signed-off-by: Kevin Carter <kevin.carter@rackspace.com>

meta/main.yml

@@ -23,6 +23,7 @@ galaxy_info:
     - name: Ubuntu
       versions:
         - trusty
+        - xenial
   categories:
     - cloud
     - python

vars/ubuntu-16.04.yml

@@ -0,0 +1,41 @@
+---
+# Copyright 2016, 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.
+
+# Common apt packages
+keystone_apt_packages:
+  - apache2
+  - apache2-utils
+  - debhelper
+  - dh-apparmor
+  - docutils-common
+  - git
+  - libffi-dev
+  - libapache2-mod-wsgi
+  - libjs-sphinxdoc
+  - libjs-underscore
+  - libldap2-dev
+  - libsasl2-dev
+  - libxslt1.1
+  - libxslt1-dev
+  - libxml2-dev
+  - python-dev
+  - rsync
+
+keystone_idp_apt_packages:
+  - ssl-cert
+  - xmlsec1
+
+keystone_developer_apt_packages:
+  - build-essential