Improve class documentation for xapp writers

Also bump RMR version used in test from 4.0.5 to 4.1.2

Signed-off-by: Lott, Christopher (cl778h) <cl778h@att.com>
Change-Id: I6179a12d460c609bde9af6b41f58abfae96ad0ab
diff --git a/.gitreview b/.gitreview
index f5eadb0..cebbb53 100644
--- a/.gitreview
+++ b/.gitreview
@@ -3,3 +3,4 @@
 port=29418
 project=ric-plt/xapp-frame-py
 defaultbranch=master
+defaultremote=origin