updated ... realized I cannot remove bundler since then the gem would not be found (we already run the shellout with bundler since RUBYOPT is set) ... and switching to bundle exec does not work without the patch from #1309 ... so for now just some cleanup to make the other PRs cleaner

@grosser JRuby 9000 should have a green CI, it doesn't: https://travis-ci.org/puma/puma/jobs/238616761

error seems to be:

  2) Error:
TestIntegration#test_restart_closes_keepalive_sockets:
#<Class:0x3cfe95b1>: execution expired
    org/jruby/RubyIO.java:2233:in `gets'
    /home/travis/build/puma/puma/test/test_integration.rb:93:in `wait_for_server_to_boot'
    /home/travis/build/puma/puma/test/test_integration.rb:82:in `restart_server'
    /home/travis/build/puma/puma/test/test_integration.rb:56:in `restart_server_and_listen'
    /home/travis/build/puma/puma/test/test_integration.rb:208:in `test_restart_closes_keepalive_sockets'

already restarted it twice ... reproduced it and turns out the -Ilib re-injection did not work on jruby ... so another bug fixed :D

added more time to the timeout since it kept failing and on master the test took 59s ... on this branch it took 64 ... so I hope just randomness but now jruby has a bit more time ...

time ruby test/test_integration.rb -n 'TestIntegration#test_restart_closes_keepalive_sockets'

somehow TestThreadPool#test_trim_is_ignored_if_no_waiting_threads failed on ruby 2.1 now ... but should be unrealted ...

2.1 and jruby are green 🎉