add a little breathing room to the timing in the specs
add a little breathing room to the timing in the specs

Using timecop to freeze at the *precise* moment where the condition
changes can cause problems due to rounding error.

nateberkopec/raven-ruby,if1live/raven-ruby,timcheadle/raven-ruby,zanker/raven-ruby,sunkencity/raven-ruby,spredfast/raven-ruby,getsentry/raven-ruby,ShakrMedia/raven-ruby,jakecraige/raven-ruby,looker/raven-ruby,alyssa/raven-ruby