redis: use auto generated redis pass

Rename redis_password into
opencontrail_redis_password to reuse
defined in CC variable.

PROD-22096

Change-Id: I4df7d7d946beda7f41812a37973135aec431710f
diff --git a/metadata/service/control/control.yml b/metadata/service/control/control.yml
index 58b33fe..728e53a 100644
--- a/metadata/service/control/control.yml
+++ b/metadata/service/control/control.yml
@@ -11,7 +11,7 @@
     opencontrail_admin_user: 'contrail'
     keystone_service_token: 'none'
     openstack_region: RegionOne
-    redis_password: 'none'
+    opencontrail_redis_password: 'none'
   opencontrail:
     common:
       version: ${_param:opencontrail_version}
@@ -134,7 +134,7 @@
       cache:
         engine: redis
         host: ${_param:cluster_local_address}
-        password: ${_param:redis_password}
+        password: ${_param:opencontrail_redis_password}
         port: 6379
       members:
       - host: ${_param:cluster_node01_address}