Update apt keys

  * Add and switch apt.mirantis.com key

Related-Bug: PROD-17862 (PROD:17862)

Change-Id: I0cd21a3fb4d23a182660aa39643f885aa74852a3
diff --git a/linux/system/repo/mcp/extra.yml b/linux/system/repo/mcp/extra.yml
index 7711fa0..d2a9a49 100644
--- a/linux/system/repo/mcp/extra.yml
+++ b/linux/system/repo/mcp/extra.yml
@@ -1,3 +1,5 @@
+classes:
+- system.linux.system.repo.keystorage.mirantis_com
 parameters:
   _param:
     apt_mk_version: stable