moved release repositories to mirror.mirantis.com

Related: PROD-17108

Change-Id: I1167ad1e4823e2c9f91f15d4741fc48da19b8aec
diff --git a/linux/system/repo/mcp/apt_mirantis/cassandra.yml b/linux/system/repo/mcp/apt_mirantis/cassandra.yml
index 308f555..337321c 100644
--- a/linux/system/repo/mcp/apt_mirantis/cassandra.yml
+++ b/linux/system/repo/mcp/apt_mirantis/cassandra.yml
@@ -7,11 +7,8 @@
     system:
       repo:
         mcp_cassandra:
-          source: "deb [arch=amd64] http://apt.mirantis.com/${_param:linux_system_codename}/cassandra/ ${_param:linux_system_repo_mcp_cassandra_version} ${_param:linux_system_repo_mcp_cassandra_version_number}"
+          source: "deb [arch=amd64] http://mirror.mirantis.com/${_param:linux_system_repo_mcp_cassandra_version}/cassandra/ ${_param:linux_system_repo_mcp_cassandra_version_number} main"
           architectures: amd64
-          key_url: "http://apt.mirantis.com/public.gpg"
+          key_id: F8358FA2F2833C93
+          key_server: keyserver.ubuntu.com
           clean_file: true
-          pin:
-          - pin: 'release a=${_param:linux_system_repo_mcp_cassandra_version}'
-            priority: 1100
-            package: '*'