Merge "fix tox python3 overrides"

tox.ini

@@ -3,6 +3,7 @@ envlist = py27,py35,pep8,cover_report
 skipsdist = True
 
 [testenv]
+basepython = python3
 usedevelop = True
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
@@ -10,28 +11,34 @@ commands = adjutant-api test {posargs}
 setenv = VIRTUAL_ENV={envdir}
 
 [testenv:pep8]
+basepython = python3
 commands = flake8
 
 [testenv:cover]
+basepython = python3
 commands =
     coverage run --source='adjutant' .tox/cover/bin/adjutant-api test {posargs}
     coverage html -d cover
     coverage xml -o cover/coverage.xml
 
 [testenv:cover_report]
+basepython = python3
 commands =
     coverage run --source='.' .tox/cover_report/bin/adjutant-api test {posargs}
     coverage report --include adjutant/* -m
 
 [testenv:venv]
+basepython = python3
 commands = {posargs}
 
 [testenv:docs]
+basepython = python3
 commands =
     doc8 doc/source
     python setup.py build_sphinx
 
 [testenv:api-ref]
+basepython = python3
 commands =
     doc8 api-ref/source
     python setup.py build_sphinx -s api-ref/source/ --build-dir api-ref/build/