systemvm: vncport evaluation (#8369)

* make sure env var gets evaluated by using double quotes

* delete unsused scripts

Author: DaanHoogland

systemvm/agent/scripts/consoleproxy.sh

@@ -33,7 +33,7 @@ setup_console_proxy() {
   echo "$public_ip $NAME" >> /etc/hosts
 
   log_it "Applying iptables rule for VNC port ${VNCPORT}"
-  sed -i 's/8080/${VNCPORT}/' /etc/iptables/rules.v4
+  sed -i "s/8080/${VNCPORT}/" /etc/iptables/rules.v4
   echo "${VNCPORT}" > /root/vncport
   log_it "Creating VNC port ${VNCPORT} file for VNC server configuration"