New structure of mirror.mirantis.com

Change-Id: I6985f6d55da8f0722b748a8bdb856c32ecc63ce5
diff --git a/linux/system/repo/mcp/apt_mirantis/docker.yml b/linux/system/repo/mcp/apt_mirantis/docker.yml
index d549979..d3314a9 100644
--- a/linux/system/repo/mcp/apt_mirantis/docker.yml
+++ b/linux/system/repo/mcp/apt_mirantis/docker.yml
@@ -6,7 +6,7 @@
     system:
       repo:
         mcp_docker:
-          source: "deb [arch=amd64] http://mirror.mirantis.com/${_param:linux_system_repo_mcp_docker_version}/docker/ ${_param:linux_system_codename} stable"
+          source: "deb [arch=amd64] http://mirror.mirantis.com/${_param:linux_system_repo_mcp_docker_version}/docker/${_param:linux_system_codename}/ ${_param:linux_system_codename} stable"
           architectures: amd64
           key_id: 8D81803C0EBFCD88
           key_server: keyserver.ubuntu.com