Fix ThreadDeadlockHealthCheck reference.
Fix ThreadDeadlockHealthCheck reference.

gburton1/metrics,chenxianghua2014/metrics,ind9/metrics,mtakaki/metrics,timezra/metrics,mveitas/metrics,wfxiang08/metrics,slovdahl/metrics,kevintvh/metrics,dropwizard/metrics,dropwizard/metrics,AltitudeDigital/metrics,mt0803/metrics,Banno/metrics,tempredirect/metrics,rexren/metrics,unitsofmeasurement/metrics,mnuessler/metrics,randomstatistic/metrics,thelastpickle/metrics,signalfx/metrics,ChetnaChaudhari/metrics,gburton1/metrics,ohr/metrics,infusionsoft/yammer-metrics,fcrepo4-archive/metrics,slachiewicz/metrics,jasw/metrics,mspiegel/metrics,dropwizard/metrics,mattnelson/metrics,valery1707/dropwizard-metrics,bentatham/metrics,jplock/metrics,infusionsoft/yammer-metrics,mveitas/metrics,egymgmbh/metrics,cirrus-dev/metrics,fcrepo4-archive/metrics