Allow to set reconciliation timeout

[csviri]

Having a timeout for reconciliation could mitigate issues when because of some issue in the implementation, the reconciliation would be stuck, and would hold the thread forever.

This is something, that could be configured per controller bases.

Note that implementation wise this might be harder then it looks first, since currently the the thread that executes the reconcile also does some post processing, so this would require subtle changes in threading model.

[csviri]

Wonder if we can do more than just interrupt the thread when timed out. And handle the interrupted threads also in the ReconciliationDispatcher.

[csviri]

Thinking more about this, in general interrupting the thread would not interrupt blocking IO. There is not reason to stuck other than a IO operation (assuming there is no error in logic in the reconciler implementation - think infinite loops). The IO operation Usually HTTP call, or req/resp protocol, should be have a timeout setting to prevent the thread to wait indefinitely; (Not just fabric8 client but also any API clients)
So I'm not absolutely convinced, that this will be that useful, but still might help in some situations.

Pls let me know what do you think. @xstefank @metacosm @shawkins @manusa . thx!!