Changed references to tcpcloud/ docker images to mirantis/

Change-Id: Id91481df94c9f6d7e4dd824a5ddb3e637254f34d
diff --git a/docker/client/compose/service/gerrit.yml b/docker/client/compose/service/gerrit.yml
index eeb126e..50d933b 100644
--- a/docker/client/compose/service/gerrit.yml
+++ b/docker/client/compose/service/gerrit.yml
@@ -2,8 +2,8 @@
   - system.docker.client.compose
 parameters:
   _param:
-    docker_image_gerrit: tcpcloud/gerrit:2.13.6
-    docker_image_mysql: tcpcloud/mysql:5.6
+    docker_image_gerrit: mirantis/gerrit:2.13.6
+    docker_image_mysql: mirantis/mysql:5.6
     gerrit_ldap_server: ""
     gerrit_ldap_bind_user: ""
     gerrit_ldap_bind_password: ""