Adapt VPN service to mimic that of our devices + mount systemd in the supervisor

tools/dind/config/services/openvpn-resin.service

@@ -0,0 +1,14 @@
+[Unit]
+Description=OpenVPN Application On Resin
+Wants=prepare-openvpn.service
+After=syslog.target network.target prepare-openvpn.service
+
+[Service]
+PrivateTmp=true
+Type=forking
+PIDFile=/var/run/openvpn/resin.pid
+ExecStartPre=-/bin/mkdir -p /var/run/openvpn
+ExecStart=/usr/sbin/openvpn --daemon --writepid /var/run/openvpn/resin.pid --cd /etc/openvpn/ --config client.conf
+
+[Install]
+WantedBy=multi-user.target

tools/dind/config/services/openvpn@client.service.d/uuid.conf

@@ -1,6 +0,0 @@
-[Service]
-WorkingDirectory=/usr/src/app
-EnvironmentFile=/usr/src/app/config/env
-ExecStartPre=/usr/src/app/vpn-init
-TimeoutStartSec=0
-Restart=always

tools/dind/config/services/prepare-openvpn.service

@@ -0,0 +1,13 @@
+[Unit]
+Description=Prepare OpenVPN Application On Resin
+Before=openvpn@client.service
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+WorkingDirectory=/usr/src/app
+EnvironmentFile=/usr/src/app/config/env
+ExecStart=/usr/src/app/vpn-init
+
+[Install]
+WantedBy=multi-user.target

tools/dind/config/services/resin-supervisor-dind.service

@@ -1,8 +1,8 @@
 [Unit]
 Description=resin-supervisor-dind
-Requires=confd.service docker.service openvpn@client.service
+Requires=confd.service docker.service openvpn-resin.service
 After=confd.service
-Before=openvpn@client.service
+Before=openvpn-resin.service
 
 [Service]
 WorkingDirectory=/usr/src/app
@@ -24,6 +24,7 @@ ExecStart=/bin/bash -c 'source /usr/src/app/resin-vars && \
 	-v /var/log/supervisor-log:/var/log \
 	-v /:/mnt/root \
 	-v /etc/resolv.conf:/etc/resolv.conf:rw \
+	-v /var/run/dbus:/var/run/dbus \
 	-e "API_ENDPOINT=$API_ENDPOINT" \
 	-e "REGISTRY_ENDPOINT=$REGISTRY_ENDPOINT" \
 	-e "PUBNUB_SUBSCRIBE_KEY=$PUBNUB_SUBSCRIBE_KEY" \