Giving better formatting to Powershell test execution.

Author: Hovsep Mkrtchyan

src/Common/Commands.ScenarioTests.Common/EnvironmentSetupHelper.cs

@@ -293,14 +293,15 @@ public virtual Collection<PSObject> RunPowerShellTest(params string[] scripts)
                     if (powershell.Streams.Error.Count > 0)
                     {
                         var sb = new StringBuilder();
+
+                        sb.AppendLine("Test failed due to a non-empty error stream, check the error stream in the test log for more details.");
+                        sb.AppendLine(string.Format("{0} total Errors", powershell.Streams.Error.Count));
                         foreach (var error in powershell.Streams.Error)
                         {
-                            sb.AppendLine(error.ErrorDetails.Message);
+                            sb.AppendLine(error.Exception.ToString());
                         }
 
-                        throw new RuntimeException(
-                            "Test failed due to a non-empty error stream, check the error stream in the test log for more details.\r\n" +
-                            sb.ToString());
+                        throw new RuntimeException(sb.ToString());
                     }
 
                     return output;