Title: #1925: ui_tests: extend test_selinuxusermap.py suite
Extend test_selinuxusermap.py suite with new test cases. Details in the ticket.
We also modify "add_table_associations" to handle "cancel" and
"negative" in the way other methods works.
Lastly, we start using dialog_btn=None to test keyboard confirmation as we did use it
incorrectly with "Negative=True" where it was already confirmed by
To pull the PR as Git branch:
git remote add ghfreeipa https://github.com/freeipa/freeipa
git fetch ghfreeipa pull/1925/head:pr1925
git checkout pr1925