Add min_responses to send_model_and_wait()

[SYangster]

4717625

• expose min_responses argument in ModelController's send_model_and_wait()
• hide wait_time_after_min_received argument, set default to 0

Types of changes

• [x] Non-breaking change (fix or new feature that would not break existing functionality).
• [ ] Breaking change (fix or new feature that would cause existing functionality to change).
• [ ] New tests added to cover the changes.
• [ ] Quick tests passed locally by running ./runtest.sh.
• [ ] In-line docstrings updated.
• [ ] Documentation updated.

[SYangster]

/build

[SYangster]

/build