Allowed CheckSignature to not check System.Management.Automation.dll.
Allowed CheckSignature to not check System.Management.Automation.dll.

AzureAutomationTeam/azure-powershell,AzureAutomationTeam/azure-powershell,AzureAutomationTeam/azure-powershell,AzureAutomationTeam/azure-powershell,AzureAutomationTeam/azure-powershell,AzureAutomationTeam/azure-powershell