moved release repositories to mirror.mirantis.com

Related: PROD-17108

Change-Id: I1167ad1e4823e2c9f91f15d4741fc48da19b8aec
diff --git a/linux/system/repo/mcp/apt_mirantis/aptly.yml b/linux/system/repo/mcp/apt_mirantis/aptly.yml
index b0cf536..f91c2ed 100644
--- a/linux/system/repo/mcp/apt_mirantis/aptly.yml
+++ b/linux/system/repo/mcp/apt_mirantis/aptly.yml
@@ -6,11 +6,8 @@
     system:
       repo:
         mcp_aptly:
-          source: "deb [arch=amd64] http://apt.mirantis.com/${_param:linux_system_codename}/aptly/ ${_param:linux_system_repo_mcp_aptly_version} main"
+          source: "deb [arch=amd64] http://mirror.mirantis.com/${_param:linux_system_repo_mcp_aptly_version}/aptly/ squeeze main"
           architectures: amd64
-          key_url: "http://apt.mirantis.com/public.gpg"
+          key_id: 9E3E53F19C7DE460
+          key_server: keys.gnupg.net
           clean_file: true
-          pin:
-          - pin: 'release a=${_param:linux_system_repo_mcp_aptly_version}'
-            priority: 1100
-            package: '*'