contrib/rpm: require dbus-tools

The NM system unit uses dbus-send to tell NM to reload
configuration. We could replace dbus-send with 'kill -HUP', but the
systemd.service manual page warns against that because it is
asynchronous. So add the proper dependency.

https://bugzilla.redhat.com/show_bug.cgi?id=1745659
17 jobs for bg/rpm-require-dbus-tools-rh1745659 in 86 minutes and 41 seconds (queued for 51 seconds)
latest
Status Job ID Name Coverage
  Test
passed #554957
allowed to fail
checkpatch

00:01:05

manual #554962
allowed to fail manual
t_centos:7.5.1804
passed #554963
t_centos:7.6.1810

00:28:32

passed #554969
t_debian:10

00:23:21

passed #554968
t_debian:9

00:20:16

passed #554971
t_debian:sid

00:23:03

manual #554970
allowed to fail manual
t_debian:testing
passed #554958
t_fedora:28

00:33:55

passed #554959
t_fedora:29

00:47:33

passed #554960
t_fedora:30

00:31:48

manual #554961
allowed to fail manual
t_fedora:rawhide
passed #554964
t_ubuntu:16.04

00:22:02

passed #554965
t_ubuntu:18.04

00:24:13

manual #554967
allowed to fail manual
t_ubuntu:devel
manual #554966
allowed to fail manual
t_ubuntu:rolling
 
  External
failed https://desktopqe-jenkins.rhev-ci-vms.eng.rdu2.redhat.com/job/beaker-NetworkManager-gitlab-trigger-code-upstream/644/

failed https://desktopqe-jenkins.rhev-ci-vms.eng.rdu2.redhat.com/job/beaker-NetworkManager-gitlab-trigger-code-upstream/644/

07:37:40