* Mix and Match Workloads
* rerun_type - ['iteration', 'complete'] - allows you to rerun complete
browbeat workload or iteratively
* browbeat/config.py for loading and validating config schema
* tests/test_config.py to test config.py
Change-Id: I99ea87c01c17d5d06cf7f8d1eec3299aa8d483a5