Add the actual SecureController base class.
Add the actual SecureController base class.

Also, there is no longer a need to remove the DBSession
after every request, as that is now being done for us
in the transaction middleware.

fedora-infra/fedora-packages,fedora-infra/fedora-packages,fedora-infra/fedora-packages,fedora-infra/fedora-packages,Fale/fedora-packages,Fale/fedora-packages,Fale/fedora-packages