Upgrade JMH to 1.1.1
Upgrade JMH to 1.1.1

Also, uses a property to manage the JMH version in a single place

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