Creating 5.0.2-SNAPSHOT for voltha-2.3 support

Change-Id: I5c8dd5c66be681c87dee0c335d14a2a70893049b
diff --git a/.gitreview b/.gitreview
index d765be6..bc8624d 100644
--- a/.gitreview
+++ b/.gitreview
@@ -3,3 +3,4 @@
 port=29418
 project=sadis.git
 defaultremote=origin
+defaultbranch=voltha-2.3