fix prfDog/watchdog interwork
prfDog unit test
make prf:stop/1 return the value of CB:terminate/1 (for testing)
new rebar
hide eunit behind TEST macro
add watchdog:delete_triggers/0
fix testcases
get collector state through prfHost:state/1
remove orddict dependency
cosmetic
implement prfDog:quit/0
fix race conditions in tests
v0.84.0