[1.2.X] Converted initial_sql_regress tests from doctests (sort of...) to...

[1.2.X] Converted initial_sql_regress tests from doctests (sort of...) to unittests.  We have always been at war with doctests.  Backport of [14179].

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@14180 bcc190cf-cafb-0310-a4f2-bffc1f526a37