globaleaks/plugins/notification.py

feat and test of https://github.com/globaleaks/GlobaLeaks/issues/268
feat and test of https://github.com/globaleaks/GlobaLeaks/issues/268
enhanced unitTest helpers
session expire when used after the default lifetime https://github.com/globaleaks/GlobaLeaks/issues/269
Merge branch 'master' into feature/gpg-notification

Conflicts:
	globaleaks/plugins/notification.py
	globaleaks/rest/errors.py
	globaleaks/tests/helpers.py
fixed unitTest