Adding template for AuthRules in EH

[sazeesha]

Contributing guide

https://github.com/Azure/azure-quickstart-templates/blob/master/1-CONTRIBUTION-GUIDE/README.md

Changelog

Description of the change

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[singhkays]

Need a better name rather than just template folder name here. Also is there a reason folder name isn't all lower-case?

[singhkays]

This doesn't seem like a 301 template, more like 201. There's only a few resources in this.

[sazeesha]

Complexity of a template for our service is defined by the type of resource being created and not just the number. Besides there a lot going on in this template. eg: some resources need to be created serially and that needs the correct use of dependson property. A lot of customers have reported this issue and it needs to addressed via a template.

[sazeesha]

Can anyone review this? we have customers waiting for this template.

[gatneil]

Normally we'd ask that you use a raw string for apiVersion instead of a variable, but this case the user is passing in the apiVersion via parameter, so that advice doesn't really make sense; looks good; merging