Minor. Fix travis build error due to unsupported oraclejdk7 in trusty container
Minor. Fix travis build error due to unsupported oraclejdk7 in trusty container

(cherry picked from commit 6d80c91953e796528ef23f031521fea7da73ad3a)
Signed-off-by: jerryshao <2676c1e0be9d9df57419d05258d46b7142312de2@hortonworks.com>

meisam/incubator-livy,ajbozarth/incubator-livy,meisam/incubator-livy,ajbozarth/incubator-livy,ajbozarth/incubator-livy,meisam/incubator-livy,meisam/incubator-livy,ajbozarth/incubator-livy,meisam/incubator-livy,meisam/incubator-livy,ajbozarth/incubator-livy,ajbozarth/incubator-livy