Package metering agent and vpn agent

Two new agents were added by upstream: metering agent and vpn agent.
We need to package their executable and configuration files.

Closes-bug: #1223893
Change-Id: I0d9779b10716b056bc9f9fde5b914e15704e1741
Add swift-client to all personas that have cinder

As cinder now requires swift client, we should build it when we
build cinder.

Change-Id: Iaa329b7cec9aa2a363452a0d11b11d1b01422894
Merge "Package metering agent and vpn agent"
Merge "Add swift-client to all personas that have cinder"