Update gitreview file

Related-prod: PROD-22634

Change-Id: I408e1979ee32a1ca2a9b7503108d949e631784d9
(cherry picked from commit f1c4e772b6ac35d2d2e04fe0fad4cdd41c0dbaed)
(cherry picked from commit bb9015aaa602af4453771ccca0edc0ad371409b2)
diff --git a/.gitreview b/.gitreview
index 84b5114..27128d3 100644
--- a/.gitreview
+++ b/.gitreview
@@ -1,4 +1,5 @@
 [gerrit]
-host=review.openstack.org
+host=gerrit.mcp.mirantis.com
 port=29418
-project=openstack/tempest.git
+project=packaging/sources/tempest.git
+defaultbranch=mcp/xenial/rocky