ARROW-1527: Fix Travis CI JDK9 build
ARROW-1527: Fix Travis CI JDK9 build

Update `.travis.yml` to install JDK9 package as it seems it is not
part of the default trusty image.

Author: Laurent Goujon <laurent@dremio.com>

Closes #1089 from laurentgo/laurent/travis-jdk9 and squashes the following commits:

19299b31 [Laurent Goujon] ARROW-1527: Fix Travis CI JDK9 build

itaiin/arrow,cpcloud/arrow,itaiin/arrow,majetideepak/arrow,pcmoritz/arrow,siddharthteotia/arrow,laurentgo/arrow,xhochy/arrow,itaiin/arrow,NonVolatileComputing/arrow,apache/arrow,wesm/arrow,wagavulin/arrow,xhochy/arrow,dremio/arrow,pcmoritz/arrow,icexelloss/arrow,dremio/arrow,apache/arrow,pcmoritz/arrow,dremio/arrow,renesugar/arrow,laurentgo/arrow,tebeka/arrow,apache/arrow,majetideepak/arrow,NonVolatileComputing/arrow,itaiin/arrow,laurentgo/arrow,tebeka/arrow,kou/arrow,siddharthteotia/arrow,apache/arrow,icexelloss/arrow,itaiin/arrow,pcmoritz/arrow,wesm/arrow,pcmoritz/arrow,itaiin/arrow,wagavulin/arrow,siddharthteotia/arrow,itaiin/arrow,NonVolatileComputing/arrow,icexelloss/arrow,apache/arrow,itaiin/arrow,renesugar/arrow,apache/arrow,kou/arrow,dremio/arrow,majetideepak/arrow,cpcloud/arrow,pcmoritz/arrow,cpcloud/arrow,icexelloss/arrow,pcmoritz/arrow,wesm/arrow,dremio/arrow,itaiin/arrow,itaiin/arrow,dremio/arrow,tebeka/arrow,cpcloud/arrow,NonVolatileComputing/arrow,NonVolatileComputing/arrow,wagavulin/arrow,icexelloss/arrow,dremio/arrow,dremio/arrow,yufeldman/arrow,laurentgo/arrow,laurentgo/arrow,wagavulin/arrow,laurentgo/arrow,apache/arrow,itaiin/arrow,xhochy/arrow,apache/arrow,dremio/arrow,renesugar/arrow,majetideepak/arrow,icexelloss/arrow,siddharthteotia/arrow,tebeka/arrow,xhochy/arrow,yufeldman/arrow,siddharthteotia/arrow,kou/arrow,tebeka/arrow,NonVolatileComputing/arrow,dremio/arrow,xhochy/arrow,xhochy/arrow,majetideepak/arrow,majetideepak/arrow,cpcloud/arrow,pcmoritz/arrow,kou/arrow,cpcloud/arrow,itaiin/arrow,xhochy/arrow,renesugar/arrow,icexelloss/arrow,yufeldman/arrow,kou/arrow,kou/arrow,renesugar/arrow,siddharthteotia/arrow,siddharthteotia/arrow,NonVolatileComputing/arrow,laurentgo/arrow,apache/arrow,majetideepak/arrow,NonVolatileComputing/arrow,laurentgo/arrow,pcmoritz/arrow,laurentgo/arrow,icexelloss/arrow,pcmoritz/arrow,wagavulin/arrow,kou/arrow,pcmoritz/arrow,renesugar/arrow,xhochy/arrow,siddharthteotia/arrow,NonVolatileComputing/arrow,wagavulin/arrow,apache/arrow,kou/arrow,wesm/arrow,renesugar/arrow,laurentgo/arrow,majetideepak/arrow,tebeka/arrow,wagavulin/arrow,pcmoritz/arrow,xhochy/arrow,laurentgo/arrow,itaiin/arrow,wagavulin/arrow,wesm/arrow,apache/arrow,wagavulin/arrow,wagavulin/arrow,wesm/arrow,siddharthteotia/arrow,siddharthteotia/arrow,xhochy/arrow,wagavulin/arrow,dremio/arrow,icexelloss/arrow,yufeldman/arrow,tebeka/arrow,majetideepak/arrow,renesugar/arrow,wesm/arrow,majetideepak/arrow,renesugar/arrow,apache/arrow,apache/arrow,tebeka/arrow,laurentgo/arrow,renesugar/arrow,laurentgo/arrow,laurentgo/arrow,cpcloud/arrow,tebeka/arrow,yufeldman/arrow,wesm/arrow,wesm/arrow,pcmoritz/arrow,yufeldman/arrow,NonVolatileComputing/arrow,apache/arrow,itaiin/arrow,cpcloud/arrow,laurentgo/arrow,icexelloss/arrow,renesugar/arrow,kou/arrow,xhochy/arrow,pcmoritz/arrow,majetideepak/arrow,itaiin/arrow,cpcloud/arrow,icexelloss/arrow,xhochy/arrow,cpcloud/arrow,renesugar/arrow,pcmoritz/arrow,kou/arrow,NonVolatileComputing/arrow,kou/arrow,icexelloss/arrow,kou/arrow,majetideepak/arrow,yufeldman/arrow,majetideepak/arrow,wesm/arrow,xhochy/arrow,wagavulin/arrow,cpcloud/arrow,renesugar/arrow,siddharthteotia/arrow,yufeldman/arrow,majetideepak/arrow,cpcloud/arrow,tebeka/arrow,kou/arrow,yufeldman/arrow,renesugar/arrow,cpcloud/arrow,kou/arrow,xhochy/arrow,icexelloss/arrow,icexelloss/arrow,wesm/arrow,yufeldman/arrow,yufeldman/arrow,wesm/arrow,wesm/arrow,xhochy/arrow,renesugar/arrow,wesm/arrow,cpcloud/arrow,majetideepak/arrow