update .travis.yml - test matrix with openjdk8 & oraclejdk8, php 5.6.20 & 7.0.5, scala 2.11.8 & 2.12.0-M4
update .travis.yml - test matrix with openjdk8 & oraclejdk8, php 5.6.20 & 7.0.5, scala 2.11.8 & 2.12.0-M4

giabao/php-utils