fix android test failures related to trailing commas (causing parsing errors)

Author: erosb

tests/vanilla/src/main/resources/org/everit/json/schema/issues/issue480/schema.json

@@ -2,13 +2,13 @@
   "oneOf": [
     {"required": ["union-query"]},
     {"required": ["sql-string"]},
-    {"required": ["rest-url"]},
+    {"required": ["rest-url"]}
   ],
   "type": "object",
   "additionalProperties": false,
   "properties": {
     "union-query": {"type": "string"},
     "rest-url": {"type": "string"},
-    "sql-string": {"type": "string"},
+    "sql-string": {"type": "string"}
   }
 }

tests/vanilla/src/main/resources/org/everit/json/schema/issues/issue480/subject-invalid.json

@@ -1,4 +1,4 @@
 {
   "union-query": "xyz",
-  "sql-string": "xyz",
+  "sql-string": "xyz"
 }