Refactor keystorage and arond.

   * Move key's to soft-param
   * Using link-structure, aka ${linux:XXX:key}
     broke some formulas logic

Closes-Bug: PROD-23577 (PROD:23577)

Change-Id: I81dc528372ec73ac7650f921fc5df76a8ee2027a
diff --git a/linux/system/repo/mcp/apt_mirantis/saltstack.yml b/linux/system/repo/mcp/apt_mirantis/saltstack.yml
index 5ba85c0..1c155d3 100644
--- a/linux/system/repo/mcp/apt_mirantis/saltstack.yml
+++ b/linux/system/repo/mcp/apt_mirantis/saltstack.yml
@@ -11,6 +11,7 @@
       repo:
         mcp_saltstack:
           source: "deb [arch=amd64] ${_param:linux_system_repo_mcp_saltstack_url}/${_param:linux_system_codename}/ ${_param:linux_system_codename} main"
+          key: ${_param:linux_system_repo_mcp_saltstack_key}
           architectures: amd64
           clean_file: true
           pinning: