r23177: Add in a new provision-backend script. This helps set up the OpenLDAP or...

r23177: Add in a new provision-backend script.  This helps set up the OpenLDAP or Fedora DS backend.

This required a new mkdir() call in ejs.

We can now provision just the schema for ad2oLschema to operate on
(with provision_schema(), without performing the whole provision, just
to wipe it again (adjustments to 'make test' to come soon).

Andrew Bartlett
(This used to be commit 01d54d13dc66ef2127ac52c64ede53d0790738ec)