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/Dockerfile.voltha-onos b/Dockerfile.voltha-onos
index ef9bdf2..ae46d70 100644
--- a/Dockerfile.voltha-onos
+++ b/Dockerfile.voltha-onos
@@ -34,7 +34,7 @@
 
 
 # Unpack and install specific apps from download stage
-FROM onosproject/onos:2.2-latest as install
+FROM onosproject/onos:2.2.4 as install
 
 # The ENV settings must be replicated below as they are not shared between stages
 ENV ONOS=/root/onos
@@ -58,7 +58,7 @@
 
 
 # Create the final image coping over the installed applications from the install stage
-FROM onosproject/onos:2.2-latest
+FROM onosproject/onos:2.2.4
 
 # The ENV settings must be replicated below as they are not shared between stages
 ENV ONOS=/root/onos