testsuite: make dbus-configuration test smarter v2

Configuration of test hosts differs from the default configuration,
which is required in dbus-configuration test. This patch restores the
default value of tested options.

Signed-off-by: Jakub Filak <jfilak@redhat.com>
testsuite: wait for hooks

The sosreport event may be run as the first post-create event. In such
a case kernel-vmcore-harvest fails because the required files don't
exist yet.

Signed-off-by: Jakub Filak <jfilak@redhat.com>