Generate and upload custom openssl keys

User can add new keys to Astute config file
PUPPET_KEYS. All files by default will be
upload to /var/lib/<key name>.key on nodes
and original for new nodes will be saved on
master node in Astute container on
/var/lib/<deployment id>/<key name>/<key name>.key

Change-Id: Ieac08257465eaebad5fce87f2fd67c25f46a8671
Related-Bug: #1314200
Merge "Generate and upload custom openssl keys"