Fixed selection of individual tests on command line.
Fixed selection of individual tests on command line.

It is more important than specifying the order of test cases (the order will
be undefined after this fix).

chromakey/django-salesforce,philchristensen/django-salesforce,django-salesforce/django-salesforce,chromakey/django-salesforce,hynekcer/django-salesforce,chromakey/django-salesforce,django-salesforce/django-salesforce,django-salesforce/django-salesforce,hynekcer/django-salesforce,hynekcer/django-salesforce,philchristensen/django-salesforce,philchristensen/django-salesforce