tests: move pytest settings from kallithea/tests/pytest.ini to setup.cfg pytest.ini was added in 9b8ba0f1c87b but didn't work. pytest only uses one configuration file and does not merge settings from multiple files [1]. The first detected file is setup.cfg thus should contain all relevant configuration. [1] http://pytest.org/latest/customize.html#initialization-determining-rootdir-and-inifile

[tox]
envlist = py{26,27}-{pytest,nose}

[testenv]
setenv =
    PYTHONHASHSEED = 0
deps =
    nose: nose
    pytest: pytest
commands =
    nose: nosetests {posargs}
    pytest: py.test {posargs}