Work around docker rate limit in CSITs

CSITs are failing regularly due to download rate limits that were
recently introduced on dockerhub.  Modified the yaml files to download
all images from nexus3 instead of dockerhub.

Issue-ID: POLICY-2895
Change-Id: I3ce37a5fc65fa82ddf1124653019cb24ff73f9ee
Signed-off-by: Jim Hahn <jrh3@att.com>
diff --git a/scripts/policy/policy-apex-pdp/docker-compose-apex.yml b/scripts/policy/policy-apex-pdp/docker-compose-apex.yml
index b7ba21c..0201cc9 100644
--- a/scripts/policy/policy-apex-pdp/docker-compose-apex.yml
+++ b/scripts/policy/policy-apex-pdp/docker-compose-apex.yml
@@ -1,5 +1,5 @@
 # Copyright (C) 2019 Nordix Foundation.
-# Modifications Copyright (C) 2019 AT&T Intellectual Property.
+# Modifications Copyright (C) 2019-2020 AT&T Intellectual Property.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -18,7 +18,7 @@
     driver: bridge
 services:
    mariadb:
-      image: mariadb:${POLICY_MARIADB_VER}
+      image: nexus3.onap.org:10001/mariadb:${POLICY_MARIADB_VER}
       container_name: mariadb
       hostname: mariadb
       command: ['--lower-case-table-names=1', '--wait_timeout=28800']