Issue #240 chore: add the openvpn script

cloud/openvpn/openvpn.sh

+#!/bin/bash
+userPassword=$1
+#download the packages
+cd /tmp
+wget -c http://swupdate.openvpn.org/as/openvpn-as-2.1.9-Ubuntu16.amd_64.deb
+#install the software
+sudo dpkg -i openvpn-as-2.1.9-Ubuntu16.amd_64.deb
+#update the password for user openvpn
+sudo echo "openvpn:$userPassword"|sudo chpasswd
+#configure server network settings
+PUBLICIP=$(curl -s ifconfig.me)
+sudo apt-get install sqlite3
+sudo sqlite3 "/usr/local/openvpn_as/etc/db/config.db" "update config set value='$PUBLICIP' where name='host.name';"
+#restart OpenVPN AS service
+sudo systemctl restart openvpnas
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