Releasing voltha-onos:4.1.5

(Version 4.1.4 was already released and the -dev was wrongly set)

Change-Id: I7b718001a5b02d41ee36d1637077b7adb048bcc5
diff --git a/VERSION b/VERSION
index 3470fb3..b1cbc1f 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-4.1.4-dev4
+4.1.5