Update rspec-core dependency to version 2.5.2
Update rspec-core dependency to version 2.5.2

BryanH/follow-all,BryanH/follow-all,jasnow/follow-all,codeforamerica/follow-all,codeforamerica/follow-all,jasnow/follow-all,codeforamerica/follow-all,BryanH/follow-all,jasnow/follow-all