adds reproducer for #480

Author: erosb

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

@@ -0,0 +1,18 @@
+{
+  "schemaLocation": "#",
+  "pointerToViolation": "#",
+  "causingExceptions": [{
+    "pointerToViolation": "#",
+    "causingExceptions": [{
+      "schemaLocation": "#/oneOf/2",
+      "pointerToViolation": "#",
+      "causingExceptions": [],
+      "keyword": "required",
+      "message": "required key [rest-url] not found"
+    }],
+    "keyword": "oneOf",
+    "message": "#: 2 subschemas matched instead of one"
+  }],
+  "keyword": "allOf",
+  "message": "#: only 1 subschema matches out of 2"
+}

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

@@ -0,0 +1,14 @@
+{
+  "oneOf": [
+    {"required": ["union-query"]},
+    {"required": ["sql-string"]},
+    {"required": ["rest-url"]},
+  ],
+  "type": "object",
+  "additionalProperties": false,
+  "properties": {
+    "union-query": {"type": "string"},
+    "rest-url": {"type": "string"},
+    "sql-string": {"type": "string"},
+  }
+}

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

@@ -0,0 +1,4 @@
+{
+  "union-query": "xyz",
+  "sql-string": "xyz",
+}