param for specific repo release version (apt_mk)

Change-Id: Ief3c9e0e5ff0b5b068aba9ef45ef95c9d4152a02
diff --git a/linux/system/repo/mcp/salt.yml b/linux/system/repo/mcp/salt.yml
index d40cc5f..6d79919 100644
--- a/linux/system/repo/mcp/salt.yml
+++ b/linux/system/repo/mcp/salt.yml
@@ -1,15 +1,16 @@
 parameters:
   _param:
     apt_mk_version: stable
+    linux_system_repo_mcp_salt_version: ${_param:apt_mk_version}
   linux:
     system:
       repo:
         mcp_salt:
-          source: "deb [arch=amd64] http://apt-mk.mirantis.com/${_param:linux_system_codename}/ ${_param:apt_mk_version} salt"
+          source: "deb [arch=amd64] http://apt-mk.mirantis.com/${_param:linux_system_codename}/ ${_param:linux_system_repo_mcp_salt_version} salt"
           architectures: amd64
           key_url: "http://apt-mk.mirantis.com/public.gpg"
           clean_file: true
           pin:
-          - pin: 'release a=${_param:apt_mk_version}'
+          - pin: 'release a=${_param:linux_system_repo_mcp_salt_version}'
             priority: 1100
             package: '*'