Releasing 1.7.4 for voltha-2.9

Change-Id: I210a788771b980d9918a2a591ff016ae29544c3f
diff --git a/VERSION b/VERSION
index 6148044..10c0880 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.7.4-dev
+1.7.4