Fixes failure when building trino-server alone

Added a dummy test in trino-server

core/trino-server/src/test/java/io/trino/server/TestDummy.java

@@ -0,0 +1,22 @@
+/*
+ * 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.trino.server;
+
+import org.junit.jupiter.api.Test;
+
+public class TestDummy
+{
+    @Test
+    public void buildRequiresTestToExist() {}
+}