param for specific repo release version (apt_mk)

Change-Id: Ief3c9e0e5ff0b5b068aba9ef45ef95c9d4152a02
diff --git a/linux/system/repo/mcp/contrail.yml b/linux/system/repo/mcp/contrail.yml
index c0ecc92..0d9d68e 100644
--- a/linux/system/repo/mcp/contrail.yml
+++ b/linux/system/repo/mcp/contrail.yml
@@ -1,15 +1,16 @@
 parameters:
   _param:
-    linux_repo_contrail_component: oc311
     apt_mk_version: stable
+    linux_repo_contrail_component: oc311
+    linux_system_repo_mcp_contrail_version: ${_param:apt_mk_version}
   linux:
     system:
       repo:
         mcp_opencontrail:
-          source: "deb [arch=amd64] http://apt-mk.mirantis.com/${_param:linux_system_codename}/ ${_param:apt_mk_version} ${_param:openstack_version} ${_param:linux_repo_contrail_component} extra"
+          source: "deb [arch=amd64] http://apt-mk.mirantis.com/${_param:linux_system_codename}/ ${_param:linux_system_repo_mcp_contrail_version} ${_param:openstack_version} ${_param:linux_repo_contrail_component} extra"
           architectures: amd64
           key_url: "http://apt-mk.mirantis.com/public.gpg"
           pin:
-          - pin: 'release a=${_param:apt_mk_version}'
+          - pin: 'release a=${_param:linux_system_repo_mcp_contrail_version}'
             priority: 1100
             package: '*'