ipatests: fix TestUnprivilegedUserPermissions
A new test has been added to TestUnprivilegedUserPermissions that
duplicates the steps done in the precedent test. As the tests
are usually run sequentially, no need to duplicate.
Fixes: https://pagure.io/freeipa/issue/8413
Reviewed-By: Mohammad Rizwan <myusuf@redhat.com>
Reviewed-By: Rob Crittenden <rcritten@redhat.com>