VOL-3111 Group removal support by VOLTHA Core

Change-Id: Ifb3a7cf62d1f71faec32c3048bad1a0fc3fea2dd
diff --git a/VERSION b/VERSION
index 69fa968..9080d9c 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.5.0-dev
+2.5.1-dev