Enable no pushdown tests

Signed-off-by: Yuanchun Shen <yuanchu@amazon.com>

Author: yuancu

integ-test/src/test/java/org/opensearch/sql/ppl/PPLIntegTestCase.java

@@ -28,6 +28,12 @@
 public abstract class PPLIntegTestCase extends SQLIntegTestCase {
   private static final Logger LOG = LogManager.getLogger();
 
+  @Override
+  protected void init() throws Exception {
+    super.init();
+    updatePushdownSettings();
+  }
+
   protected JSONObject executeQuery(String query) throws IOException {
     return jsonify(executeQueryToString(query));
   }