We weren't searching the cn=sudo container so all members of a
sudocmdgroup looked indirect.
Add a label for sudo command groups.
Update the tests to include verifying that membership is done
properly.
ticket 1003
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