ipautil: remove the timeout argument of run()
The argument depends on the platform-specific timeout binary and is used
only in ipaclient.ntpconf.
Call the timeout binary explicitly in ipaclient.ntpconf and remove the
argument.
https://fedorahosted.org/freeipa/ticket/6474
Reviewed-By: Stanislav Laznicka <slaznick@redhat.com>