NRP PS commandlet changes as per NRP Brooklyn APIs changes

[Nilambari]

Will send another PR in some time with recorded tests. Can you Please approve this PR as without this merge its blocking for other team members to send their changes' PR. Thanks!

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[Nilambari]

Added recorded tests back.

[hovsepm]

fix indentation.

[Nilambari]

done,

[hovsepm]

Please include changes to changelog.txt file in your PR.

[hovsepm]

Please fix indentation in several files in this PR. too many places to mention them one by one.

[Nilambari]

Not sure about changlog.txt file. sharing overall changes in this PR:-
PS command changes as per NRP Brooklyn APIs changes:-

1. Command New-AzureLocalNetworkGateway parameter name change
2. Command Reset-AzureLocalNetworkGateway renamed to Set-AzureLocalNetworkGateway, added new parameter
3. Resource: VirtualNetworkGateway parameter changes
4. Command New-AzureVirtualNetworkGateway parameter changes
5. Removed command Resize-AzureVirtualNetworkGateway
6. Command Reset-AzureVirtualNetworkGatewayConnection renamed to Set-AzureVirtualNetworkGatewayConnection

[Nilambari]

Added PS changes details in changeLog.txt file. Can you Please accept this PR? Thanks a lot!