BUCK: deploy plugin api to local and remote maven repos

`buck build api_install` copies the artifacts to the local maven repository.

`buck build api_deploy` uploads the artifacts to the remote maven repository.
The type of the repo is induced from the Gerrit version name, i. e.
* 2.8-SNAPSHOT: snapshot repo
* 2.8: release repo

Change-Id: I063834bb39311a4d92f5fdbb183f70b1fb8418b6
7 files changed