Fixed some Oracle backend test DB creation code bugs.
Fixed some Oracle backend test DB creation code bugs.

Made saving of modified settings compatible with multi-db, removed dead and superfluous code.

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extra : convert_revision : svn%3Abcc190cf-cafb-0310-a4f2-bffc1f526a37/django/trunk%4014489

adieu/django-nonrel,adieu/django-nonrel,adieu/django-nonrel