Add a .gitreview file to the new repo

This file is needed in order for people cloning the repo
to be able to initialize it for gerrit by the
"git review -s" command

Change-Id: I468a5d3fced8fc84c3d189224e88518ed60f0e04
Story: 2006166
Task: 36512
Signed-off-by: Al Bailey <Al.Bailey@windriver.com>

.gitreview

@@ -0,0 +1,4 @@
+[gerrit]
+host=review.opendev.org
+port=29418
+project=starlingx/openstack-armada-app.git