Resolve issue with the return value for test runner

[whart222]

No description provided.

[coveralls]

Coverage decreased (-1.1%) to 61.038% when pulling a10b49d on issue-22 into dedf027 on master.

[codecov-io]

Codecov Report

Merging #23 into master will decrease coverage by 0.45%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #23      +/-   ##
==========================================
- Coverage      63%   62.54%   -0.46%     
==========================================
  Files          87       87              
  Lines        8752     8753       +1     
==========================================
- Hits         5514     5475      -39     
- Misses       3238     3278      +40

Impacted Files	Coverage Δ
pyutilib/dev/runtests.py	72.51% <100%> (ø)	⬆️
pyutilib/math/median2.py	9.09% <0%> (-90.91%)	⬇️
pyutilib/pyro/util.py	22.83% <0%> (-3.09%)	⬇️
pyutilib/pyro/dispatcher.py	20.22% <0%> (-2.88%)	⬇️
pyutilib/subprocess/processmngr.py	60.34% <0%> (-1.68%)	⬇️
pyutilib/misc/archivereader.py	81.61% <0%> (-0.57%)	⬇️
pyutilib/workflow/task.py	97.68% <0%> (-0.57%)	⬇️
pyutilib/component/core/core.py	84.61% <0%> (-0.45%)	⬇️
pyutilib/pyro/worker.py	14.76% <0%> (-0.43%)	⬇️
pyutilib/workflow/functor.py	97.51% <0%> (-0.41%)	⬇️
... and 3 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update dedf027...a10b49d. Read the comment docs.