Add version number to the documentation footer

Currently, nova-dpm documentation does not have the version number
in the footer.  This patch set adds the version information to the
``doc/source/conf.py``.

Closes-Bug: #1662519
Change-Id: I00de3cadda730fb78303579142d82d1ed10c01fa

doc/source/conf.py

@@ -51,6 +51,13 @@ master_doc = 'index'
 project = u'nova-dpm'
 copyright = u'2016, OpenStack Foundation'
 
+# Version information
+import nova_dpm.version
+# The short X.Y version.
+version = nova_dpm.version.version_info.version_string()
+# The full version, including alpha/beta/rc tags.
+release = nova_dpm.version.version_info.release_string()
+
 # If true, '()' will be appended to :func: etc. cross-reference text.
 add_function_parentheses = True
 

nova_dpm/version.py

@@ -0,0 +1,15 @@
+# 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.
+
+from pbr import version
+
+version_info = version.VersionInfo('nova-dpm')