vcs: remove confusing and unnecessary local variable This removes the "username" local variable, substituting the equivalent "user.username". The function also has another, unrelated use of the same local variable name; this OTHER "username" variable is untouched. The relevant code is duplicated between Hg and Git... and thus also this change.

[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}