Add the following new options to control test repetition:

• --repeatTestsTimeSecs
• --repeatTestsMax

These options help repeat a test until the --repeatTestsTimeSecs is reached. The default value, None, indicates no time limit specified and resmoke uses the --repeatTests value. An additional parameter, --repeatTestsMax, which would be used in conjunction with --repeatTests (minimum number of repetitions) to bound the --repeatTestsTimeSecs between these values. The test runs as follows:

• At least --repeatTests times
• Stops repeating when either the --repeatTestsTimeSecs or --repeatTestsMax is reached

See SERVER-38911 for a proof of concept of this option.