If ExecCommand fails, re-throw the exception instead of swallowing it

Author: michaelklishin

projects/client/Unit/src/unit/TestConnectionBlocked.cs

@@ -133,6 +133,7 @@ protected void ExecCommand(string ctl, string args)
               proc.Start();
             } catch (Exception e) {
                 Console.WriteLine("Failed to run subprocess with args " + args + " : " + e.Message);
+		throw e;
             }
         }