Fix test failures

Author: slozier

Src/IronPython/Runtime/Operations/StringOps.cs

@@ -1219,7 +1219,8 @@ private static void AppendValueForTranslate(this StringBuilder ret, object? mapp
                     return;
                 case int mappedInt:
                     if (mappedInt > 0xFFFF) {
-                        throw PythonOps.ValueError("character mapping must be in range(0x10000)");
+                        // TODO: change to a ValueError in Python 3.5
+                        throw PythonOps.TypeError("character mapping must be in range(0x10000)");
                     }
                     ret.Append((char)mappedInt);
                     break;

Tests/test_codeccallbacks_stdlib.py

@@ -15,7 +15,6 @@ def load_tests(loader, standard_tests, pattern):
 
     if is_ironpython:
         failing_tests = [
-            test.test_codeccallbacks.CodecCallbackTest('test_backslashescape'), # UTF-16 vs. UTF-32
             test.test_codeccallbacks.CodecCallbackTest('test_badandgoodbackslashreplaceexceptions'), # UTF-16 vs. UTF-32
             test.test_codeccallbacks.CodecCallbackTest('test_badandgoodreplaceexceptions'), # UTF-16 vs. UTF-32
             test.test_codeccallbacks.CodecCallbackTest('test_badandgoodxmlcharrefreplaceexceptions'), # UTF-16 vs. UTF-32

Tests/test_struct_stdlib.py

@@ -15,7 +15,6 @@ def load_tests(loader, standard_tests, pattern):
 
     if is_ironpython:
         failing_tests = [
-            test.test_struct.StructTest('test_705836'), # AssertionError: OverflowError not raised by pack
             test.test_struct.StructTest('test_bool'), # struct.error: expected bool value got IronPython.NewTypes.System.Object_1$1
             test.test_struct.StructTest('test_calcsize'), # AssertionError: 4 not greater than or equal to 8
             test.test_struct.StructTest('test_count_overflow'), # AssertionError: error not raised by calcsize