This commit adds some basic unit tests which runs ostestr in some
basic configurations against a fake test suite to ensure that the
ostestr always exits with a 0 on success and 1 on errors when running
tests. This is invaluable for using ostestr in ci systems.
This commit migrates the current subunit trace commit from tempest-lib
with the commits:
d7c3f6b Merge "Summarize expected failures"
e29ec71 Summarize expected failures
21e3f6a Enable stdout passthrough for subunit-trace
d588748 Default the worker number to 0 not NaN
87c1442 Fix subunit-trace on python < 2.7
b73b9eb bring over fail only functionality from nova
5715fd6 Switch to elapsed time in subunit-trace summary
d2e4040 Setup subunit-trace as an entry point
and also adds the start of the ostestr command to wrap testr.
