Add debug testenv in tox

Once we add debug testenv, we can use "tox -e debug -- --debug"
to debug test cases when tox is running.

Change-Id: Ia52506cfe130b5abd867519337bcaedd589a98d4

test-requirements.txt

@@ -12,6 +12,7 @@ fixtures>=1.3.1
 mock>=1.2
 ordereddict
 oslosphinx!=3.4.0,>=2.5.0 # Apache-2.0
+oslotest>=1.10.0 # Apache-2.0
 sphinx!=1.2.0,!=1.3b1,<1.3,>=1.1.2
 tempest-lib>=0.12.0
 testrepository>=0.0.18

tox.ini

@@ -17,6 +17,17 @@ commands =
   find . -type f -name "*.pyc" -delete
   python setup.py testr --testr-args='{posargs}'
 
+[testenv:debug]
+commands = oslo_debug_helper -t manilaclient/tests {posargs}
+
+[testenv:debug-py27]
+basepython = python2.7
+commands = oslo_debug_helper -t manilaclient/tests {posargs}
+
+[testenv:debug-py34]
+basepython = python3.4
+commands = oslo_debug_helper -t manilaclient/tests {posargs}
+
 [testenv:pep8]
 commands =
   flake8