make travis run the right ITs

Author: mkristian

.travis.yml

@@ -1,4 +1,4 @@
 language: java
 sudo: false
-install: mvn install -Dmaven.test.skip -Dinvoker.skip;cd jruby9;mvn install -Dmaven.test.skip -Dinvoker.skip
-script: cd jruby9;mvn verify
+install: mvn install -Dmaven.test.skip -Dinvoker.skip
+script: mvn verify -Pintegration-test