modify travis config to try fixing gemset does not exist error
modify travis config to try fixing gemset does not exist error

MakeYourLaws/MakeYourLaws,MakeYourLaws/MakeYourLaws,saizai/MakeYourLaws,saizai/MakeYourLaws,MakeYourLaws/MakeYourLaws,saizai/MakeYourLaws,MakeYourLaws/MakeYourLaws,saizai/MakeYourLaws