Make REST services simpler

[davutcavdar]

• Simplify stream create method
• Merge StreamSourceRestService and BroadcastRestServices based on same operations, create, update, delete etc.

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Customer comment :

• API doesn't follow RESTful principles (ie use POST for create, PUT for
  update and DELETE for deletion). Here's what I would expect from a modern
  API:
  Create: POST /broadcast/{id} where {id} is optional
  Update: PUT /broadcast/{id}
  Delete: DELETE /broadcast/{id}

Related methods would use same format, e.g.
Create endpoint: POST /broadcast/{id}/endpoint/{endpointId}
Update endpoint: PUT /broadcast/{id}/endpoint/{endpointId}
Delete endpoint: DELETE /broadcast/{id}/endpoint/{endpointId}

• Stream creation endpoints are confusing, there are too many with slight
  variations: create, createProtalBroadcast, createWithSocial,
  createWithStreamID, addStreamSource. What if I want to create an external
  stream, with specified streamId and social endpoints? In my opinion one
  should be enough. Same applies to update. It's my understanding that
  /streamSource/updateCamInfo should be used to update stream source
  configuration, but the name is confusing and makes it sound like it only
  applies to IP cameras.