Suppress warning related to bug in SpotBugs

spotbugs/spotbugs#1978

src/main/java/fll/web/developer/importdb/ImportDBDump.java

@@ -13,6 +13,7 @@
 import org.apache.tomcat.util.http.fileupload.FileUploadException;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
+import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
 import fll.Utilities;
 import fll.db.GlobalParameters;
 import fll.db.ImportDB;
@@ -57,6 +58,7 @@ public class ImportDBDump extends BaseFLLServlet {
   /**
    * @return an integer to differentiate in-memory databases.
    */
+  @SuppressFBWarnings(value = "SSD_DO_NOT_USE_INSTANCE_LOCK_ON_SHARED_STATIC_DATA", justification = "https://github.com/spotbugs/spotbugs/issues/1978")
   public static int getNextDBCount() {
     synchronized (ImportDBDump.class) {
       return importdbCount++;