daemonSetupNetworking: Don't leak services

daemonSetupNetworking: Don't leak services

When setting up the daemon networking, new services are created. These
services then have sockets to listen on. Once created, the service
objects are added to corresponding server object. However, during that
process, server increases reference counter of the service object. So,
at the end of the function, we should decrease it again. This way the
service objects will have only 1 reference, but that's okay since
servers are the only objects having a reference.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>