Merge "fix tox python3 overrides"

tox.ini

@@ -18,6 +18,7 @@ commands =
 whitelist_externals = find
 
 [testenv:pep8]
+basepython = python3
 commands =
     flake8
     # Check that .po and .pot files are valid:
@@ -25,6 +26,7 @@ commands =
 whitelist_externals = bash
 
 [testenv:venv]
+basepython = python3
 commands = {posargs}
 
 [testenv:functional]
@@ -34,14 +36,17 @@ setenv =
 passenv = OS_*
 
 [testenv:cover]
+basepython = python3
 commands =
     python setup.py testr --coverage --testr-args='{posargs}'
     coverage report
 
 [testenv:debug]
+basepython = python3
 commands = oslo_debug_helper -t senlinclient/tests {posargs}
 
 [testenv:docs]
+basepython = python3
 deps =
   -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt}
   -r{toxinidir}/requirements.txt
@@ -49,6 +54,7 @@ deps =
 commands = sphinx-build -W -b html doc/source doc/build/html
 
 [testenv:releasenotes]
+basepython = python3
 deps =
   -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt}
   -r{toxinidir}/requirements.txt