Add release notes

Closes-Bug: CLOUDOPS-761
Change-Id: If1aa57c0e1617a312f36e52c503a40b5ee166c91
(cherry picked from commit 7607e5a65486453e80b1a7a042051df61e672301)
diff --git a/doc/requirements.txt b/doc/requirements.txt
index a05a1d9..a2a321f 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -1,4 +1,6 @@
 furo
+pbr
+reno
 six
 sphinx
 sphinx-autobuild