Add network create and delete scripts for openstack project

These scripts create standard dmz and cluster networks for
hosting the development cluster.

network_create

+#!/bin/bash
+
+# Create the dmz and cluster networks as the external and
+# internal networks of the ohpc cluster
+
+# create the dmz network for the head node to attach 
+openstack network create dmznet
+
+openstack subnet create --subnet-range 192.168.100.0/24 --dns-nameserver 8.8.8.8 --network dmznet dmzsubnet
+
+# connect dmz to the internet
+openstack router create borderrouter
+
+openstack router set borderrouter --external-gateway bright-external-flat-externalnet
+
+openstack router add subnet borderrouter dmzsubnet
+
+# create the cluster network for the compute nodes
+openstack network create clusternet
+
+openstack subnet create --subnet-range 10.1.1.0/24 --no-dhcp --network clusternet clustersubnet

network_delete

+#!/bin/bash
+
+# delete the dmz and cluster networks as the external and
+# internal networks of the ohpc cluster
+
+# delete the dmz network for the head node to attach 
+openstack router remove subnet borderrouter dmzsubnet
+openstack network delete dmznet
+
+# remove connect dmz to the internet
+openstack router delete borderrouter
+
+# delete the cluster network for the compute nodes
+openstack network delete clusternet