Use correct name of oslo debugger script

As of oslotest 1.2.0 the oslo debugger script dropped the .sh
extension. This patch corrects the use the script name in tox.ini

Change-Id: If36e727332af82c8a45af7306f55753d72983623
Fixes aggressive use of translation hints

The oslo.i18n docs say not to use the hints if the message will
ultimately be user facing:
    http://docs.openstack.org/developer/oslo.i18n/guidelines.html

Change-Id: I7162bcb3dd23f5df2f1220ec531b2e40b2588ce2
Remove nonexistant param from docstring

Change-Id: Ie6744f0c1b7dfabc6c9a20fc8fb470e69dedaf3f
Merge "Remove nonexistant param from docstring"
Merge "Fixes aggressive use of translation hints"
Use oslo.concurrency instead of sync'ed version

oslo.concurrency was released, we should use that instead
of the sync'ed code from oslo-incubator.

Change-Id: Iabde5d4247c642b8d7d572e5c22c324bd3a2797c
Merge "Use correct name of oslo debugger script"
Merge "Use oslo.concurrency instead of sync'ed version"
remove runtime dep on python-pbr
sync parameter values with keystone-dist.conf

and adjust descriptions to take dist.conf defaults into account (rhbz#923912)

Change-Id: If36c384f86843a6506a494d79beca65639fb3480