3a8320a1d7
This change enables to specify a client certificate/key with: * usual CLI options (--os-cert/--os-key) * usual environment variables ($OS_CERT/$OS_KEY) * os-client-config Change-Id: Ibeaaa5897ae37b37c1e91f3e47076e4e8e4a8ded Closes-Bug: #1565112