Add new aptly repository keys.

Change-Id: I74dcd7a19c158ce72bd54ce14cae705e69d9227f
diff --git a/linux/system/repo/mcp/apt_mirantis/aptly.yml b/linux/system/repo/mcp/apt_mirantis/aptly.yml
index 5a023a5..f563502 100644
--- a/linux/system/repo/mcp/apt_mirantis/aptly.yml
+++ b/linux/system/repo/mcp/apt_mirantis/aptly.yml
@@ -8,6 +8,6 @@
         mcp_aptly:
           source: "deb [arch=amd64] http://mirror.mirantis.com/${_param:linux_system_repo_mcp_aptly_version}/aptly/${_param:linux_system_codename}/ squeeze main"
           architectures: amd64
-          key_id: 9E3E53F19C7DE460
+          key_id: ED75B5A4483DA07C
           key_server: keys.gnupg.net
           clean_file: true