Test runner: Detect extra property in 'actual' but not in 'expected'. (#407)

* Test runner: Detect extra property in 'actual' but not in 'expected'.

Also update all expected.json where this would result in errors.

* Include rmExpected.js script in case it is needed again

test/fixtures/estree/class-method/basic/expected.json

@@ -89,6 +89,7 @@
                   "column": 10
                 }
               },
+              "static": false,
               "computed": false,
               "key": {
                 "type": "Identifier",
@@ -107,7 +108,6 @@
                 },
                 "name": "foo"
               },
-              "static": false,
               "kind": "method",
               "value": {
                 "type": "FunctionExpression",
@@ -125,6 +125,7 @@
                 },
                 "id": null,
                 "generator": false,
+                "expression": false,
                 "async": false,
                 "params": [],
                 "body": {
@@ -142,8 +143,7 @@
                     }
                   },
                   "body": []
-                },
-                "expression": false
+                }
               }
             }
           ]
@@ -151,4 +151,4 @@
       }
     ]
   }
-}
+}