Merge "fix tox python3 overrides"

tox.ini

@@ -16,6 +16,7 @@ commands =
   stestr slowest
 
 [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
@@ -27,6 +28,7 @@ commands =
 whitelist_externals = rm
 
 [testenv:debug]
+basepython = python3
 commands = oslo_debug_helper {posargs}
 
 [testenv:debug-py27]
@@ -60,17 +62,21 @@ commands =
   {toxinidir}/tools/check_logging.sh {toxinidir}/manila
 
 [testenv:genconfig]
+basepython = python3
 whitelist_externals = bash
 commands =
   oslo-config-generator --config-file etc/oslo-config-generator/manila.conf
 
 [testenv:genpolicy]
+basepython = python3
 commands = oslopolicy-sample-generator --config-file=etc/manila/manila-policy-generator.conf
 
 [testenv:venv]
+basepython = python3
 commands = {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
@@ -83,6 +89,7 @@ commands =
 whitelist_externals = rm
 
 [testenv:cover]
+basepython = python3
 setenv =
     {[testenv]setenv}
     PYTHON=coverage run --source manila --parallel-mode
@@ -109,6 +116,7 @@ deps = -r{toxinidir}/requirements.txt
 commands = python tools/lintstack.py check
 
 [testenv:api-ref]
+basepython = python3
 # This environment is called from CI scripts to test and publish
 # the API Ref to developer.openstack.org.
 whitelist_externals = rm
@@ -117,6 +125,7 @@ commands =
   sphinx-build -W -b html -d api-ref/build/doctrees api-ref/source api-ref/build/html
 
 [testenv:dbrevision]
+basepython = python3
 deps = -r{toxinidir}/requirements.txt
 commands = alembic -c manila/db/migrations/alembic.ini revision -m ""{posargs}