Remove unused lib in test-rquirements.txt
python-subunit is unused now, so we can remove that, and
we have switched to use stestr, os-testr can be removed.
for details, please see [1] and [2]
[1]
[2]
@@ -13,11 +13,9 @@ os-api-ref>=1.4.0 # Apache-2.0
oslotest>=1.10.0 # Apache-2.0
PyMySQL>=0.7.6 # MIT License
psycopg2>=2.6.2 # LGPL/ZPL
-python-subunit>=1.0.0 # Apache-2.0/BSD
testtools>=2.2.0 # MIT
testresources>=2.0.0 # Apache-2.0/BSD
testscenarios>=0.4 # Apache-2.0/BSD
oslo.versionedobjects[fixtures]>=1.28.0 # Apache-2.0
-os-testr>=1.0.0 # Apache-2.0
tempest>=17.1.0 # Apache-2.0
bandit>=1.1.0 # Apache-2.0
