rollback on dummy database now has no effect (previously raised an error). This means that custom 500 error pages (and e-mailed exceptions) now work even if a database has not been configured. Fixes #4429.
rollback on dummy database now has no effect (previously raised an error). This means that custom 500 error pages (and e-mailed exceptions) now work even if a database has not been configured. Fixes #4429.

git-svn-id: 4f9f921b081c523744c7bf24d959a0db39629563@5410 bcc190cf-cafb-0310-a4f2-bffc1f526a37

mitsuhiko/django,sam-tsai/django-old,django-nonrel/django-nonrel,dcramer/django-compositepks,skevy/django,hugs/django,Smarsh/django,sam-tsai/django-old,alex/django-old,t11e/django,django-nonrel/django-nonrel,bfirsh/django-old,skevy/django,alex/django-old,hugs/django,jamespacileo/django-france,mitsuhiko/django,Instagram/django,disqus/django-old,hugs/django,alex/django-old,disqus/django-old,bfirsh/django-old,dcramer/django-compositepks,bfirsh/django-old,skevy/django,django-nonrel/django-nonrel,jamespacileo/django-france,Smarsh/django,mitsuhiko/django,Smarsh/django,dcramer/django-compositepks,Smarsh/django,disqus/django-old,Instagram/django,t11e/django,t11e/django,jamespacileo/django-france,sam-tsai/django-old,Instagram/django,sam-tsai/django-old