log_in_user: extract user session setup from LoginController The next changeset will need to set up a user login session outside LoginController. 'log_in_user' extracted and added as a top-level function in kallithea.lib.base since the code doesn't need access to the current controller. Code refactored to take a User object instead of a username, to allow callers flexibility in how the user should be looked up.

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

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