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/ubuntu.yml b/linux/system/repo/keystorage/ubuntu.yml
index aaa6f88..e5ffc2c 100644
--- a/linux/system/repo/keystorage/ubuntu.yml
+++ b/linux/system/repo/keystorage/ubuntu.yml
@@ -1,86 +1,79 @@
 parameters:
-  linux:
-    system:
-      repo:
-        ubuntu:
-          key: |
-            -----BEGIN PGP PUBLIC KEY BLOCK-----
-            Version: GnuPG v1
+  _param:
+    linux_system_repo_ubuntu_key: |-
+        -----BEGIN PGP PUBLIC KEY BLOCK-----
+        Version: GnuPG v1
 
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-        ubuntu_updates:
-          key: ${linux:system:repo:ubuntu:key}
-        ubuntu_security:
-          key: ${linux:system:repo:ubuntu:key}
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