[Backport 9.0] Run tests in non-strict JSON mode, like real applications

java-client/src/test/java/co/elastic/clients/json/JsonpMappingExceptionTest.java

@@ -98,7 +98,7 @@ public void testLookAhead() {
         // Unknown field 'baz' (JSON path: properties['foo-bar'].baz) (...line no=1, column no=36, offset=35)
 
         JsonpMappingException e = assertThrows(JsonpMappingException.class, () -> {
-            fromJson(json, TypeMapping.class);
+            fromJson(json, TypeMapping.class, SimpleJsonpMapper.INSTANCE_REJECT_UNKNOWN_FIELDS);
         });
 
         // Check escaping of non identifier path elements and path from map elements

java-client/src/test/java/co/elastic/clients/testkit/ModelTestCase.java

@@ -58,25 +58,15 @@ private static JsonpMapper createMapper(JsonImpl jsonImpl, int rand) {
         switch(jsonImpl) {
             case Jsonb:
                 System.out.println("Using a JsonB mapper (rand = " + rand + ").");
-                return new JsonbJsonpMapper() {
-                    @Override
-                    public boolean ignoreUnknownFields() {
-                        return false;
-                    }
-                };
+                return new JsonbJsonpMapper();
 
             case Jackson:
                 System.out.println("Using a Jackson mapper (rand = " + rand + ").");
-                return new JacksonJsonpMapper() {
-                    @Override
-                    public boolean ignoreUnknownFields() {
-                        return false;
-                    }
-                };
+                return new JacksonJsonpMapper();
 
             default:
                 System.out.println("Using a simple mapper (rand = " + rand + ").");
-                return SimpleJsonpMapper.INSTANCE_REJECT_UNKNOWN_FIELDS;
+                return SimpleJsonpMapper.INSTANCE;
         }
     }