* Adding NSG to the ARM eployment template when needed
* Adding tests and fixing bugs
* Removing denyall rule
* Fixing logic to determine which port to open
* Fixing config description
Export a configuration knob to change the disk caching setting. The
default value remains ReadWrite. This seems the most appropriate value
given Packer. Certain disk sizes require that disk caching be disable,
and this knob allows the user to do just that.