Add an option to specify a configuration file when starting clipper

[Corey-Zumar]

• Currently, users have to issue many register_model, deploy_model, and add_application commands (among others) via clipper_admin after starting clipper.

• These commands need to be re-issued after models are stopped, Redis is cleared, etc.

• It would be helpful to allow users to specify a set of models and applications to deploy and register, respectively, through a configuration file. This configuration could then be specified via the call to start_clipper.

[Corey-Zumar]

@dcrankshaw This issue belongs to Nikhil Duggirila. He needs to be added as a collaborator before I can assign this to him.

[gmittal]

I noticed that the PR (#389) for this got abandoned... any chance this is still up for grabs?

[rkooo567]

@gmittal Hi! We would want to have more sophisticated design for this feature. We will definitely add this feature sooner or later. I will add this to the feature request and start working on it soon.