Fixup always True test.

I horked this in diff 2 of https://rbcommons.com/s/twitter/r/908/

commit 6ad878ccbc6654be068e3670feca659de4dbb41d
Author: John Sirois <jsirois@twitter.com>
Date:   Mon Aug 18 12:38:27 2014 -0600

    Fixup always True test.

 tests/python/pants_test/tasks/test_jvm_run.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Testing Done:
$ PANTS_DEV=1 ./pants goal test tests/python/pants_test/tasks/:jvm_run --test-pytest-options=-v
...
13:25:44 00:01   [test]
13:25:44 00:01     [pytest]
13:25:44 00:01       [run]
                     ============== test session starts ===============
                     platform linux2 -- Python 2.6.9 -- py-1.4.23 -- pytest-2.6.1 -- /usr/bin/python2.6
                     plugins: cov, timeout
                     collected 1 items

                     tests/python/pants_test/tasks/test_jvm_run.py::JvmRunTest::test_cmdline_only PASSED

                     ============ 1 passed in 0.17 seconds ============

13:25:45 00:02     [junit]
13:25:45 00:02     [specs]
               SUCCESS

Bugs closed: 494, 496

Reviewed at https://rbcommons.com/s/twitter/r/911/