移除表前缀

[okami-chen]

Is your feature request related to a problem? Please describe.
表 ue_proxy希望生成的model等，不使用UeProxy而是使用Proxy，不要Ue前缀

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[zhufuyi]

生成model代码不支持自定义表名(去掉前缀)，生成的go的结构名称(驼峰风格)与mysql表名是一致的。