[VOL-4345] Moving to ONOS 2.5.3 as base image to include some fixes.
Used for voltha 2.8 as well.

Change-Id: I4a4f7808b7c7da5e002a3f5d99095e1734f2e2ee
diff --git a/Dockerfile.voltha-onos b/Dockerfile.voltha-onos
index 1555687..24652e2 100644
--- a/Dockerfile.voltha-onos
+++ b/Dockerfile.voltha-onos
@@ -34,7 +34,7 @@
 
 
 # Unpack and install specific apps from download stage
-FROM onosproject/onos:2.5.2 as install
+FROM onosproject/onos:2.5.3 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:2.5.2
+FROM onosproject/onos:2.5.3
 
 # The ENV settings must be replicated below as they are not shared between stages
 ENV ONOS=/root/onos