Add Jenkins script for networking

This commit adds a Jenkins script for use with `vcloud-edge_gateway`.
Add YAML to create Org vDC networks

This commit adds a YAML file in order to create org vDC networks. Org vDC
networks are required in order to ensure traffic from a vDC can be routed via an
Edge Gateway.
Add generate_fogfile.sh

This commit adds a Bash script in which the credentials for Fog are generated
based on the $VCLOUD_USER and $VCLOUD_PASS environment variables.