SLIDER-202: add codahale metrics
SLIDER-202 initial chaos monkey
SLIDER-202 Monkey implemented but not conditional/integrated
SLIDER-314 factor out internal keys into class InternalKeys
SLIDER-202: tweak mock tests to automatically get name from test method unless overridden.
SLIDER-202 monkey has mock tests and is set to run in AM if enabled
SLIDER-202: Chaos Monkey adds a (slow) minicluster test.
Merge branch 'feature/SLIDER-202_chaos_monkey' into develop