Make --version work properly

We have pbr and we have oslo.config. Tell them about eachother.

Change-Id: I65d449b0ed961c824a3e7c1307aab63f73bc03ad

os_collect_config/collect.py

@@ -28,6 +28,7 @@ from os_collect_config import common
 from os_collect_config import ec2
 from os_collect_config import exc
 from os_collect_config import heat_local
+from os_collect_config import version
 from oslo.config import cfg
 
 DEFAULT_COLLECTORS = ['heat_local', 'ec2', 'cfn']
@@ -167,7 +168,8 @@ def getfilehash(files):
 def __main__(args=sys.argv, requests_impl_map=None):
     signal.signal(signal.SIGHUP, reexec_self)
     setup_conf()
-    CONF(args=args[1:], prog="os-collect-config")
+    CONF(args=args[1:], prog="os-collect-config",
+         version=version.version_info.version_string())
 
     # This resets the logging infrastructure which prevents capturing log
     # output in tests cleanly, so should only be called if there isn't already

os_collect_config/version.py

@@ -0,0 +1,18 @@
+# Copyright (c) 2013 Hewlett-Packard Development Company, L.P.
+#
+#    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.
+
+
+import pbr.version
+
+version_info = pbr.version.VersionInfo('os-collect-config')