CB-6227 fix npe (#3261)

Co-authored-by: Evgenia <139753579+EvgeniaBzzz@users.noreply.github.com>

Author: yagudin10

server/bundles/io.cloudbeaver.server/src/io/cloudbeaver/model/WebDatabaseDriverInfo.java

@@ -185,7 +185,7 @@ public Map<String, Object> getDefaultConnectionProperties() {
     public WebPropertyInfo[] getDriverProperties() throws DBWebException {
         try {
             DBPConnectionConfiguration cfg = new DBPConnectionConfiguration();
-            cfg.setUrl(driver.getSampleURL());
+            cfg.setUrl(CommonUtils.notEmpty(driver.getSampleURL()));
             cfg.setHostName(DBConstants.HOST_LOCALHOST);
             cfg.setHostPort(driver.getDefaultPort());
             cfg.setDatabaseName(driver.getDefaultDatabase());