Add the ability to disable warning emails in Powershell
The daily cap warning level cannot be set or disabled via PowerShell, only the cap reached email or level can be set.
The PowerShell command Set-AzureRmApplicationInsightsDailyCap needs to be updated accordingly to accommodate for the warning as well.
Also, when adding a new feature like this, the PowerShel needs to be updated before the feature is released for public consumption. Otherwise admins get flooded by emails if they have a lot of app insights in Azure and they then have to manually go and disabled or set the cap for hundreds of app insights.