Revert "remove need-lock on ynh-vpnclient service"

This reverts commit f8e3b543b470c76f2105493c0e445788f151f0cd.

scripts/install

@@ -81,7 +81,7 @@ systemctl stop openvpn
 
 # main service
 
-yunohost service add $service_name --description "Tunnels the internet traffic through a VPN" --test_status="systemctl is-active openvpn@client.service" --log "/var/log/ynh-vpnclient.log"
+yunohost service add $service_name --description "Tunnels the internet traffic through a VPN" --need_lock --test_status="systemctl is-active openvpn@client.service" --log "/var/log/ynh-vpnclient.log"
 yunohost service enable $service_name
 
 # checker service

scripts/upgrade

@@ -142,7 +142,7 @@ ynh_secure_remove ${tmp_dir}
 ynh_print_info "Configuring VPN client services..."
 
 # main service
-yunohost service add $service_name --description "Tunnels the internet traffic through a VPN" --test_status="systemctl is-active openvpn@client.service" --log "/var/log/ynh-vpnclient.log"
+yunohost service add $service_name --description "Tunnels the internet traffic through a VPN" --need_lock --test_status="systemctl is-active openvpn@client.service" --log "/var/log/ynh-vpnclient.log"
 
 # checker service (this service was previously integrated in yunohost but we do not do this anymore)
 if ynh_exec_warn_less yunohost service status $service_checker_name >/dev/null