reload D-Bus config after install

Vasyl Vavrychukrequested to merge
vvavrychuk-guest/connman:dbus-reload into debian/sid

Without this if system is not rebooted then we get

connection ":1.x" is not allowed to own the service "net.connman" due to security policies in the configuration file

Currently connman has reboot required notification after its install anyway. But reboot notifier is not installed on Debian by default. So it is not clear that reboot is required after installing connman.

With above reload of D-Bus config we are getting to be able to remove reboot requirement in future.

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