auth: refactor auth plugin importing The list of authentication plugins, configured in the database, may contain plugins which are no longer available. Therefore directly import the plugin in get_auth_plugins and report the ImportError to the log instead of breaking kallithea completely. Patch modified by Mads Kiilerich.

[tox]
minversion = 1.8
envlist = py{26,27}-pytest

[testenv]
setenv =
    PYTHONHASHSEED = 0
deps =
    -r{toxinidir}/dev_requirements.txt
    py26-pytest: unittest2
    python-ldap
    python-pam
commands =
    pytest: py.test {posargs}