[6.12.z] Add support for RHCloud Cloud Connector

[mstrlc]

Cherrypick of PR: #920

Description of changes

This PR adds Nailgun support for RHCloud Cloud Connector API.

Functional demonstration

This feature is tested with Robottelo test tests/foreman/api/test_rhc.py::test_positive_configure_cloud_connector,
see SatelliteQE/robottelo#11395 PRT run.

# Running in Robottelo tests/foreman/api/test_rhc.py::test_positive_configure_cloud_connector.
result = module_target_sat.api.RHCloud().enable_connector(organization_id=module_rhc_org.id)
print(result)
{'id': 4, 'targeting_id': 4, 'job_category': 'Maintenance Operations', 'task_id': '97612455-60d8-45e4-904f-d7b067b9e74f', 'task_group_id': 16, 'triggering_id': 4, 'description': 'Configure Cloud Connector', 'concurrency_level': None, 'time_span': None, 'execution_timeout_interval': None, 'password': None, 'key_passphrase': None, 'remote_execution_feature_id': 17, 'effective_user_password': None, 'ssh_user': None, 'time_to_pickup': None}

Additional Information

Nailgun tests addded and passing.

[codecov]

Codecov Report

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Additional details and impacted files

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