Using onos 2.5.7-rc3

Change-Id: I3585f0922a3b9d893b8527fbc6f2ed765ba80fc6
diff --git a/VERSION b/VERSION
index 024a35b..7fc5a96 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-5.1.0-dev10
+5.1.0-dev11