Update .travis.yml to test against Go 1.4.3 and Go 1.5.3
Update .travis.yml to test against Go 1.4.3 and Go 1.5.3

intelsdi-x/snap-plugin-collector-ceph,intelsdi-x/snap-plugin-collector-ceph,intelsdi-x/snap-plugin-collector-ceph,intelsdi-x/snap-plugin-collector-ceph