Add IsTerminatingError function

Author: cormacpayne

src/Common/Commands.Common/AzurePSCmdlet.cs

@@ -671,7 +671,7 @@ protected override void ProcessRecord()
                 base.ProcessRecord();
                 ExecuteCmdlet();
             }
-            catch (Exception ex) when (!(ex is PipelineStoppedException) && ex.InnerException != null)
+            catch (Exception ex) when (!IsTerminatingError(ex))
             {
                 WriteExceptionError(ex);
             }
@@ -697,5 +697,15 @@ public void Dispose()
             Dispose(true);
             GC.SuppressFinalize(this);
         }
+
+        public virtual bool IsTerminatingError(Exception ex)
+        {
+            if (ex is PipelineStoppedException && ex.InnerException == null)
+            {
+                return true;
+            }
+
+            return false;
+        }
     }
 }