test: use wait-online

test/units/testsuite-74.networkctl.sh

@@ -40,7 +40,7 @@ printf '%s\n' '[Match]' 'Name=test2' | cmp - "/etc/systemd/network/$NETWORK_NAME
 
 cat >"+4" <<EOF
 [Network]
-DHCP=yes
+IPv6AcceptRA=no
 EOF
 
 EDITOR='cp' script -ec 'networkctl edit "$NETWORK_NAME" --drop-in test' /dev/null
@@ -74,7 +74,7 @@ systemctl stop systemd-networkd
 (! networkctl cat @test2)
 
 systemctl start systemd-networkd
-sleep 1
+SYSTEMD_LOG_LEVEL=debug /usr/lib/systemd/systemd-networkd-wait-online -i test2:carrier --timeout 20
 networkctl cat @test2:network | cmp - <(networkctl cat "$NETWORK_NAME")
 
 EDITOR='cp' script -ec 'networkctl edit @test2 --drop-in test2.conf' /dev/null