fix setting up irods in unittests (creating folders)
correct count of dir children in irodsstorage.stat()

correct the list of sub collections, since irods counts
the current dir in getLenSubCollections().
This -1 should be much faster than the alternative,
len(c.getSubCollections())
add an auth steps for teh api functions of localstorage
fix auth in irodsstorage: raise NotAuthException when it fails
fix unittest StorageApi functions for cases with wrong credentials
hack-fix the authentication patching in unittests StorageApi

patch something different depending on the storage backend
specified. It's a hack because it creates a dependency
between the file name of the storage backend and the
patch command.
add force options to irodsstorage api, add redirection for directories

1. add force=False to several function to allow forgiving
  behaviour when not using cdmi.
2. add the redirection (by IsDirException) to rm, rmdir, ...