New structure of mirror.mirantis.com

Change-Id: I6985f6d55da8f0722b748a8bdb856c32ecc63ce5
diff --git a/linux/system/repo/mcp/apt_mirantis/cassandra.yml b/linux/system/repo/mcp/apt_mirantis/cassandra.yml
index 337321c..8bf3583 100644
--- a/linux/system/repo/mcp/apt_mirantis/cassandra.yml
+++ b/linux/system/repo/mcp/apt_mirantis/cassandra.yml
@@ -7,7 +7,7 @@
     system:
       repo:
         mcp_cassandra:
-          source: "deb [arch=amd64] http://mirror.mirantis.com/${_param:linux_system_repo_mcp_cassandra_version}/cassandra/ ${_param:linux_system_repo_mcp_cassandra_version_number} main"
+          source: "deb [arch=amd64] http://mirror.mirantis.com/${_param:linux_system_repo_mcp_cassandra_version}/cassandra/${_param:linux_system_codename}/ ${_param:linux_system_repo_mcp_cassandra_version_number} main"
           architectures: amd64
           key_id: F8358FA2F2833C93
           key_server: keyserver.ubuntu.com