allow cqld4 to run for driver=cql with no verbose warnings

adapter-cqld4/src/main/java/io/nosqlbench/adapter/cqld4/CqlDriverAdapterStub.java

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2022 nosqlbench
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.nosqlbench.adapter.cqld4;
+
+import io.nosqlbench.engine.api.activityimpl.uniform.DriverAdapter;
+import io.nosqlbench.nb.annotations.Service;
+
+@Service(value = DriverAdapter.class, selector = "cql")
+public class CqlDriverAdapterStub extends Cqld4DriverAdapter {
+}