Adding resource and docs for VPN gateways

[voojoe]

Signed-off-by: Joe McCrea joe.mccrea@sap.com

Description

Adding in resources and documentation for Azure VPN Gateways

Issues Resolved

#330

Check List

• New functionality includes tests
• All tests pass
• rake lint passes
• All commits have been signed-off for the Developer Certificate of Origin. See https://github.com/chef/chef/blob/master/CONTRIBUTING.md#developer-certification-of-origin-dco

[omerdemirok]

Thanks for this @voojoe!
Do you consider changing the name of the resource to azure_virtual_network_gateways? This will align better with the official Azure resource name here.

[omerdemirok]

This resource should be added to the project README.

[voojoe]

Thanks for this @voojoe!
Do you consider changing the name of the resource to azure_virtual_network_gateways? This will align better with the official Azure resource name here.

Hi Omer, I've renamed this now in my latest commit.

[omerdemirok]

Thanks for this excellent contribution @voojoe!!
It is a milestone for being the first community resource with the new backend.