Add 'aptkey' state module

There is only 'added' function which ensures that given key is added
to apt's key storage. It does nothing if key is already in apt's key
storage.

A key can be provided either as plain text or base64 encoded string,
or by URL.

Change-Id: I210728caffc75ac11f50029fa0e63d6af70e2e32
Related: (PROD-26981)
2 files changed