We collected the failures but didn't report it back. This changes the
API of most delete commands so rather than returning a boolean it returns
a dict with the only current key as failed.
This also adds a new parameter flag, suppress_empty. This will try to
not print values that are empty if included. This makes the output of
the delete commands a bit prettier.
ticket 687
The changes include:
* Change license blobs in source files to mention GPLv3+ not GPLv2 only
* Add GPLv3+ license text
* Package COPYING not LICENSE as the license blobs (even the old ones)
mention COPYING specifically, it is also more common, I think
https://fedorahosted.org/freeipa/ticket/239
