Update initialDepth for error handling (#1550)

* Fix target depth when skipping over handled errors

Keep reading until the reader reaches the initial depth rather than initial depth + 1

* Fix the initialDepth when handling errors in lists

The initialDepth should be +1 when handling deserialization errors in lists and arrays in order to not skip subsequent items

* Add unit tests for dictionary error handling

Ignoring errors in dictionary object by completely removing the bad items from the dictionary

Src/Newtonsoft.Json.Tests/Serialization/SerializationErrorHandlingTests.cs

@@ -1026,6 +1026,21 @@ namespace Newtonsoft.Json.Tests.Serialization
             Assert.AreEqual("Could not convert string to DateTime: 200NOTDATE. Path 'dateTime1', line 7, position 27.", errorMessages[2]);
         }
 
+        [Test]
+        public void HandleErrorInDictionaryObject()
+        {
+            var json = @"{
+                model1: { String1: 's1', Int1: 'x' },
+                model2: { String1: 's2', Int1: 2 }
+            }";
+            var dictionary = JsonConvert.DeserializeObject<TolerantDictionary<string, DataModel>>(json);
+
+            Assert.AreEqual(1, dictionary.Count);
+            Assert.IsTrue(dictionary.ContainsKey("model2"));
+            Assert.AreEqual("s2", dictionary["model2"].String1);
+            Assert.AreEqual(2, dictionary["model2"].Int1);
+        }
+
         private class DataModel
         {
             public string String1 { get; set; }
@@ -1133,4 +1148,16 @@ namespace Newtonsoft.Json.Tests.Serialization
         {
         }
     }
-}
+    
+    /// <summary>
+    /// A dictionary that ignores deserialization errors and excludes bad items
+    /// </summary>
+    public class TolerantDictionary<TKey, TValue> : Dictionary<TKey, TValue>
+    {
+        [OnError]
+        public void OnDeserializationError(StreamingContext streamingContext, ErrorContext errorContext)
+        {
+            errorContext.Handled = true;
+        }
+    }
+}