Improve reporters output while running application tests with parallelize option.

This fix would help catching tests that block application test running.

Test plan:
1) Created test `TestProjectApplicationTestsThatFail/testFail` with sleep(1000)`.
2) Ran xctool w/o fix, with `-parallelize` option and saw that xctool was stuck after next message:

     [Info] Starting TestProjectApplicationTestsThatFail.octest (bucket #1, 1 tests) (0 ms)

3) Applied the fix.
4) Ran xctool, with `-parallelize` option and saw that xctool was stuck after next messages:

    run-test TestProjectApplicationTestsThatFail.octest (8.1, iPhone 5, application-test)
      [Info] Installed 'com.facebook.TestProject'. (530 ms)
      [Info] Launching test host and running tests ... (0 ms)
        -[TestProjectApplicationTestsThatFail testFail]

5) Ran xctool, w/o `-parallelize` option and saw the same messages as on step 4).