Title: Deployment calls

Describe the issue:

We can use following REST API to list all deployed process definitions.But this REST API is not mentioned in product documentation.

~~~
[GET]  /deployment/processes
~~~

Suggestions for improvement:


Additional information:

There is minor bug with this REST API, it always requires parameters p and s (page and size),and its captured in JBPM-4578.This issue will be fixed in jBPM 6.3 release.