Feature Request : Provide a list of brokers only to be considered by proposals and executions

[yuriastafiev]

I want to be able to pass a list of brokers with REST APIs and generate proposals assuming the cluster was only consisted of those brokers that were provided.
The Executions also would take only the provided broker list into account.
I could call another rest api with a different set of brokers and get proposals and executions limited to those brokers only.

[mohitpali]

One way to deal with this can be recently added BrokerSetAwareGoal. If the list of brokers is pre-defined and is grouped as one, then one rest API call would generate proposals within a broker set boundary.