[ci] Remove oraclejdk7 from install.sh and update else to note for java 9 too

Author: hazendaz

travis/install.sh

@@ -18,10 +18,10 @@
 if [ $TRAVIS_JDK_VERSION == "openjdk6" ]; then
   # Java 1.6
   ./mvnw install -DskipTests=true -Dmaven.javadoc.skip=true -B -V -Pjava16 --settings ./travis/settings.xml
-elif [ $TRAVIS_JDK_VERSION == "oraclejdk7" ] || [ $TRAVIS_JDK_VERSION == "openjdk7" ]; then
+elif [ $TRAVIS_JDK_VERSION == "openjdk7" ]; then
   # Java 1.7
   ./mvnw install -DskipTests=true -Dmaven.javadoc.skip=true -B -V -Pjava17 --settings ./travis/settings.xml
 else
-  # Java 1.8
+  # Java 1.8 and 9
   ./mvnw install -DskipTests=true -Dmaven.javadoc.skip=true -B -V --settings ./travis/settings.xml
 fi