Consolidate Dogstatsd constants, remove from config options.
Small change to spacing
Merge pull request #946 from DataDog/remove-flush-interval

Consolidate Dogstatsd constants, remove from config options.
Send feedback to users when results are missing

Fix #897
Log check run time in debug mode

Fix #938
Better kafka check documentation

Fix #903
Merge branch 'master' into omnibus_bundling