Azure Networking: Updated saDataSizeKilobytes validation for vpn gateway connection

[misbamomin]

Description

Making the property of IPsec protocol, SALifeTimeSeconds disabled by setting it to zero.

SALifeTimeSeconds is the property of IPsec protocol which is used to reinitialize the Security association (SA) when data is sent over the connection for data security purpose. When there is high throughput SALifeTimeSeconds property of IPsec protocol can become useless.

In the current implementation SALifeTimeSeconds can be passed in between 1024 to 2147483647.

About the current change: when SALifeTimeSeconds value passed 0 it should disable the SALifeTimeSeconds property of IPsec protocol.

I updated the validation and added unit tests in azure PowerShell repository.

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)
    • {Please put the link here}
  • the markdown help files have been regenerated using the commands listed here

[ghost]

All CLA requirements met.

[dingmeng-xue]

Please sign Contributor License Agreement. Otherwise, this PR cannot be merged.

This PR needs to include the update of changelog https://github.com/Azure/azure-powershell/blob/network-february/src/Network/Network/ChangeLog.md except original change is not released yet.