Remove tuple unpacking from except clause ipalib/plugins/hbactest.py
Python 3 doesn't support tuple unpacking in except clauses. All implicit
tuple unpackings have been replaced with explicit unpacking of e.args.
https://fedorahosted.org/freeipa/ticket/5120
Reviewed-By: Tomas Babej <tbabej@redhat.com>
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>