litemall-db模块更新：

1. mybatis generator更新1.3.7
2. mybatis-generator-plugin更新1.2.12
3. 更新所有自动生成代码
4. OrderMapper,实现基于update_time的乐观锁更新

litemall-db/src/main/java/org/linlinjava/litemall/db/domain/LitemallRegionExample.java

@@ -178,6 +178,18 @@ public class LitemallRegionExample {
         distinct = false;
     }
 
+    /**
+     * This method was generated by MyBatis Generator.
+     * This method corresponds to the database table litemall_region
+     *
+     * @mbg.generated
+     * @project https://github.com/itfsw/mybatis-generator-plugin
+     */
+    public static Criteria newAndCreateCriteria() {
+        LitemallRegionExample example = new LitemallRegionExample();
+        return example.createCriteria();
+    }
+
     /**
      * This class was generated by MyBatis Generator.
      * This class corresponds to the database table litemall_region