Change apt_mk_version => mcp_version

   * Alligh all variables to one
   * Due mcp_version: ${_param:apt_mk_version}
     those change still bw compatible

Bug-relateted: PROD-24789 (PROD:24789)
Change-Id: I30b6fb0b1cb66c7d56dbb3a5e15c8bc9606405b5
diff --git a/linux/system/repo_local/mcp/contrail.yml b/linux/system/repo_local/mcp/contrail.yml
index 1443a4d..0f16826 100644
--- a/linux/system/repo_local/mcp/contrail.yml
+++ b/linux/system/repo_local/mcp/contrail.yml
@@ -2,7 +2,7 @@
   _param:
     linux_repo_contrail_component: oc311
     contrail_repo_pin_priority: 200
-    linux_system_repo_mcp_contrail_version: ${_param:apt_mk_version}
+    linux_system_repo_mcp_contrail_version: ${_param:mcp_version}
   linux:
     system:
       repo: