Merge remote-tracking branch 'origin/master'

Author: oliemansm

graphql-spring-boot-test/src/main/java/com/graphql/spring/boot/test/RequestFactory.java

@@ -19,8 +19,8 @@ static HttpEntity<Object> forJson(String json, HttpHeaders headers) {
     static HttpEntity<Object> forMultipart(String query, String variables, HttpHeaders headers) {
         headers.setContentType(MediaType.MULTIPART_FORM_DATA);
         LinkedMultiValueMap<String, Object> values = new LinkedMultiValueMap<>();
-        values.add("query", forJson(query, headers));
-        values.add("variables", forJson(variables, headers));
+        values.add("query", forJson(query, new HttpHeaders()));
+        values.add("variables", forJson(variables, new HttpHeaders()));
         return new HttpEntity<>(values, headers);
     }