[VOL-4445] Correct error type to proceed with deletion with half route

Also moving deletion of logical device and meters to correct place in transitions.go

Change-Id: I9eee03edba9ae47ec09fc3b752082a740ee0efde
diff --git a/.gitreview b/.gitreview
index c70a26b..47ea6ba 100644
--- a/.gitreview
+++ b/.gitreview
@@ -3,3 +3,4 @@
 port=29418
 project=voltha-go.git
 defaultremote=origin
+defaultbranch=voltha-2.8