fix sonar bug: change condition & not enough arguments (#1705)

dolphinscheduler-dao/src/main/java/org/apache/dolphinscheduler/dao/ProcessDao.java

@@ -457,10 +457,13 @@ public class ProcessDao {
         if(tenantId >= 0){
             tenant = tenantMapper.queryById(tenantId);
         }
-        if(tenant == null){
+        if(null == tenant){
             User user = userMapper.selectById(userId);
+
+            if (null != user) {
                 tenant = tenantMapper.queryById(user.getTenantId());
             }
+        }
         return tenant;
     }