[ci] Add oraclejdk9 to travis build
[ci] Add oraclejdk9 to travis build

ctubbsii/formatter-maven-plugin,hazendaz/formatter-maven-plugin,hazendaz/formatter-maven-plugin,ctubbsii/formatter-maven-plugin,hazendaz/formatter-maven-plugin,hazendaz/formatter-maven-plugin,ctubbsii/formatter-maven-plugin,revelc/formatter-maven-plugin,revelc/formatter-maven-plugin,ctubbsii/formatter-maven-plugin,revelc/formatter-maven-plugin,revelc/formatter-maven-plugin