Adding cmdltets to support crud operations for new Route Table child resource of VirtualHub

[nagula-ritvika]

Description

1. Added new cmdlets to support creating route tables and adding them to hub, removing route tables of a hub.
2. Exposed enableInternetSecurity property for HubVnetConnection, VpnConnection and ExpressRouteConnection and added update cmdlets needed.
3. Exposed new hub sku property and VirtualWANtype property and modified existing corresponding cmdlets as needed.

1. Design Review PR - Azure/azure-powershell-cmdlet-review-pr#397
2. The changes regarding support for EnableInternetSecurity for VirtualHubVnetConnection and VpnConnection were committed to a private-preview version in this PR - Adding support for security provider integration in cortex cmdlets. #7261. I am just picking the changes we need here.

Checklist

• I have read the Submitting Changes section of CONTRIBUTING.md
• The title of the PR is clear and informative
• The appropriate ChangeLog.md file(s) has been updated:
  • For any service, the ChangeLog.md file can be found at src/{{SERVICE}}/{{SERVICE}}/ChangeLog.md
  • A snippet outlining the change(s) made in the PR should be written under the ## Upcoming Release header -- no new version header should be added
• The PR does not introduce breaking changes
• If applicable, the changes made in the PR have proper test coverage
• For public API changes to cmdlets:
  • a cmdlet design review was approved for the changes in this repository (Microsoft internal only)
  • the markdown help files have been regenerated using the commands listed here

[adxsdkps]

Can one of the admins verify this patch?

[nagula-ritvika]

PS Design Review PR - https://github.com/Azure/azure-powershell-cmdlet-review-pr/issues/397

[nagula-ritvika]

The changes regarding support for EnableInternetSecurity for VirtualHubVnetConnection and VpnConnection were committed to a private-preview version in this PR - #7261.

I am just picking the changes we need here.

[nagula-ritvika]

I have created the PR by building the sdk locally, will revert the SDK changes when needed,

[anton-evseev]

Please add test(s) for these changes

[nagula-ritvika]

Please add test(s) for these changes

I am working on adding the tests locally and will update the PR by tomorrow. Meanwhile it would be great if you could review the other code changes if possible.

[anton-evseev]

There's a bit of inconsistency with EnableInternetSecurity: in some cmdlets it's a switch, in some - nullable bool. I get that it's done so in Set the value wouldn't be reset, but I think having two different types for one parameter would be confusing
Please also re-generate help files

[anton-evseev]

We've checked in test recordings with API version 2019-09-01 into network-october, please merge/rebase to unblock your PR

[anton-evseev]

/azp run

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Azure Pipelines successfully started running 3 pipeline(s).

[anton-evseev]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 3 pipeline(s).