fixed content checker on PATCH

Author: ujibang

src/main/java/org/restheart/hal/metadata/singletons/SimpleContentChecker.java

@@ -295,7 +295,7 @@ private BasicDBList getApplicableConditions(BasicDBList conditions, RequestConte
                 ret.add(fc);
             });
 
-            return filterNullableAndOptionalNullConditions(conditions, ret);
+            return filterNullableAndOptionalNullConditions(ret, content);
 
         } else {
             return new BasicDBList();