[Zope-CMF] more unit tests

[seb bacon]

While making some changes, I've managed to break the test
test_otherFolderTypes, which tries to use invokeFactory from a
non-PortalFolder.  portalfolder.normalfolder.invokeFactory is creating
an object in portalfolder rather than normalfolder.

I'm not quite clear where the magic is which should be creating the
object in the normal folder, so I'm having a hard time tracking down
exactly what I've broken.  Any hints?

seb