utah on phablet hangs because it does not report back to the controlling host

I had a typo in a test directory name which led to the test being aborted early and the controlling run_utah_phablet.py just waited forever.

 cat /tmp/utah.log
+ [ -d /tmp/utah-probes ]
+ rm -rf /tmp/utah-probes
+ [ -d /tmp/utah-probes ]
+ mkdir /tmp/utah-probes
+ utah -d -o /var/lib/utah/utah.yaml -r /data/ubuntu/tmp/utah_tests_pm/pm_probes.run -p /tmp/utah-probes
2013-06-27 18:51:04,121 - DEBUG - Namespace(append=False, battery='software', debug=True, format='yaml', install_type='unknown', output='/var/lib/utah/utah.yaml', probe_dir='/tmp/utah-probes', resume=False, runlist='/data/ubuntu/tmp/utah_tests_pm/pm_probes.run', state_file=None, testdir='/var/lib/utah')
2013-06-27 18:51:04,130 - INFO - ('Linux', 'ubuntu-phablet', '3.4.0-3-mako', '#13-Ubuntu SMP PREEMPT Tue Jun 25 17:07:54 UTC 2013', 'armv7l', 'armv7l')
Control file, /var/lib/utah/testsuites/probes/probes/idle_probe_suspend_blockers/tc_control, does not exist.
2013-06-27 18:51:06,115 - DEBUG - Running cleanup
+ sleep 2
+ [ -f /var/lib/utah/utah.yaml ]
utah: completed /etc/utah/autorun/01_run-utah rc=0

so the tc_control did not exist (my fail!) but then it hangs waiting for a feedback from utah on the phone.