POC: generating subresource accessors with meta programming

[jcechace]

DO NOT MERGE

Trying to refine a bit the idea @mijaros had not so long about making the code bit more DRY.

There are things which are bothering me -- e.g. Project extends OpenshiftKind yet it has different constructor. Main issue is that for other resources it's not so easy to implement the equivalent of Project#init_objects

[jcechace]

I particularly dislike the idea of monkey patching the Class class like this --- I will look for more suitable way to define the resource method