Revert .travis.yml to 80fa2662.
Revert .travis.yml to 80fa2662.

superbstreak/drill,mapr/incubator-drill,mapr/incubator-drill,vvysotskyi/drill,superbstreak/drill,paul-rogers/drill,superbstreak/drill,superbstreak/drill,apache/drill,vvysotskyi/drill,apache/drill,paul-rogers/drill,paul-rogers/drill,apache/drill,apache/drill,mapr/incubator-drill,vvysotskyi/drill,apache/drill,paul-rogers/drill,vvysotskyi/drill,apache/drill,mapr/incubator-drill,paul-rogers/drill,superbstreak/drill,mapr/incubator-drill,mapr/incubator-drill,vvysotskyi/drill,superbstreak/drill,paul-rogers/drill,vvysotskyi/drill