bug in exception handler

[afmcc]

Traceback (most recent call last):
File "/stash/miniconda3/envs/universal2/bin/tardis", line 11, in
sys.exit(tardis_main())
File "/stash/miniconda3/envs/universal2/lib/python2.7/site-packages/tardis/run.py", line 244, in tardis_main
(exit_code, factory) = run(command_args, options, checkCommandIsValid = False)
File "/stash/miniconda3/envs/universal2/lib/python2.7/site-packages/tardis/run.py", line 79, in run
c.retryJobSubmission(maxRetries = 1, retryPause = 1)
File "/stash/miniconda3/envs/universal2/lib/python2.7/site-packages/tardis/conditioner/factory.py", line 592, in retryJobSubmission
retryJob.runCommand()
File "/stash/miniconda3/envs/universal2/lib/python2.7/site-packages/tardis/job/local.py", line 135, in runCommand
self.waitOnChildren()
File "/stash/miniconda3/envs/universal2/lib/python2.7/site-packages/tardis/job/local.py", line 41, in waitOnChildren
if inst.errno == errno.ECHILD :
NameError: global name 'errno' is not defined

(should be os.ECHILD)