Merge pull request #436 from Zhangqi910/patch-3

Update library.ps1: Use Write-Warning instead of Write-Error for catch block

Author: Petebro-MSFT

ReportingServicesTools/Libraries/library.ps1

@@ -130,4 +130,4 @@ namespace Microsoft.ReportingServicesTools
 "@
 
 Try { Add-Type -TypeDefinition $source -ErrorAction Stop }
-catch { Write-Error "Error: $_" }
+catch { Write-Warning "$_" }