* Adds ExpressRoute circuit documentation
* Adds tests and doc improvements
* Code for basic Express Route Circuit support
* Use the built-in validation helper
* Added ignoreCaseDiffSuppressFunc to a few fields
* Added more information to docs
* Touchup
* Moving SKU properties into a set.
* Updates doc
* A bit more tweaks
* Switch to Sprintf for test string
* Updating the acceptance test name for consistency
Jay Wang