Do not automatically restart NM after static configuration

NM changes happen at runtime and automatically restarting it just wastes
time and introcudes more options to fail without providing any benefit.

Related issue: https://progress.opensuse.org/issues/169531

lib/mm_network.pm

@@ -228,7 +228,7 @@ sub setup_static_mm_network {
     configure_static_ip(ip => $ip, is_nm => $is_nm);
     configure_default_gateway(is_nm => $is_nm);
     configure_static_dns(get_host_resolv_conf(), is_nm => $is_nm);
-    restart_networking(is_nm => $is_nm);
+    restart_networking(is_nm => $is_nm) unless $is_nm;
 }
 
 sub restart_networking {