Use API in outbox instead of BBS [#79618154]

Signed-off-by: Max Brunsfeld <mbrunsfeld@pivotal.io>
Rename API Client to CC Client [#79618154]

Signed-off-by: Max Brunsfeld <mbrunsfeld@pivotal.io>
Rename API Client to Diego API Client [#79618154]

Signed-off-by: Max Brunsfeld <mbrunsfeld@pivotal.io>