model: remove unused 'subject' parameter of NotificationModel.create() The subject of emails is determined with EmailNotificationModel._subj_map, based on the notification type. The 'subject' parameter passed to NotificationModel.create is completely unused. Remove this parameter and update its callers, removing code that is now no longer used.

[tox]
minversion = 1.8
envlist = py27-pytest

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