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/keystorage/maas.yml b/linux/system/repo/keystorage/maas.yml
index cac2c27..3fbc6c8 100644
--- a/linux/system/repo/keystorage/maas.yml
+++ b/linux/system/repo/keystorage/maas.yml
@@ -1,36 +1,33 @@
 parameters:
-  linux:
-    system:
-      repo:
-        mcp_maas:
-          # pub   4096R/684D4A1C 2015-08-20
-          key: |
-            -----BEGIN PGP PUBLIC KEY BLOCK-----
-            Version: GnuPG v1
+  _param:
+    # pub   4096R/684D4A1C 2015-08-20
+    linux_system_repo_mcp_maas_key: |-
+        -----BEGIN PGP PUBLIC KEY BLOCK-----
+        Version: GnuPG v1
 
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-            =QeWQ
-            -----END PGP PUBLIC KEY BLOCK-----
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+        -----END PGP PUBLIC KEY BLOCK-----