C2OS Nova Session Update

1. Vagrantfile modified to create two VMs: Controller, Compute
2. Controller is allocated 2 GB RAM, and Compute is allocated 3 GB RAM and 2 vCPUs
3. Controller.sh modified
    a. Contains code from common.sh to source the UCA
    b. Removes "source common.sh" command.
    c. Outputs its IP Address to /vagrant/.controller for common.sh to pick up
4. Common.sh altered to read the Controller IP from /vagrant/.controller for use as an environment variables for other OpenStack Nodes
5. Included the Glance API Update