Fixed Travis from erroring out on branch pushes
Fixed Travis from erroring out on branch pushes

.travis.yml now uses the TRAVIS_BRANCH enviroment variable to
correctly identify the branch that was pushed and runs the
test suite on it (instead of just assuming that it's master).

SMatsushi/RAMCloud,anirajk/RAMCloud,anirajk/RAMCloud,utah-scs/RAMCloud,anirajk/RAMCloud,SMatsushi/RAMCloud,utah-scs/RAMCloud,utah-scs/RAMCloud,SMatsushi/RAMCloud,SMatsushi/RAMCloud,anirajk/RAMCloud,jblomer/ramcloud,SMatsushi/RAMCloud,anirajk/RAMCloud,utah-scs/RAMCloud,jblomer/ramcloud,SMatsushi/RAMCloud,utah-scs/RAMCloud,anirajk/RAMCloud,jblomer/ramcloud,utah-scs/RAMCloud,jblomer/ramcloud,jblomer/ramcloud,jblomer/ramcloud