Only test JRuby 9.0.0.0
Only test JRuby 9.0.0.0

The tests on travis took a long time since RVM has to download 9.0.4.0
each time the test runs.

If the gem works on 9.0.0.0 it should work on newer versions too.

twingly/twingly-analytics-api-ruby,twingly/twingly-search-api-ruby