Microsoft.Network - Subnetting is complex. Provide clarity

[MariusStorhaug]

Description

Azure Resource Reference matching to readme.md properties object for Azure Virtual network. Add an example of how to build subnet. The properties in the subnet isn't in line with Azure Resource Reference (ARR). No clear reason to break with the guidelines of staying close to the ARR.

Suggestion:

• Add an example into the readme for the subnet object/array

[rahalan]

Issue is based on resource provider level implementation. Update Documentation to highlight not to use the subnet module separately, because that will delete and redeploy all subnets