CFApp controller should reuse servicebinding.io capabilities to project the VCAP_APPLICATION env var to the app workload

[georgethebeatle]

Background

According to the servicebinding.io spec it is possible to project secrets as env vars in the workload. We could leverage this capability and delete our own code that deals with env var injection in our app workload.

[georgethebeatle]

Projecting the VCAP_APPLICATION env var via servicebinding.io will introduce complexity (management of one more object) with quiestionable return of investment. Closing.