When grpc generates a controller, replace - with _

[liangguifeng]

1. What version of Go and system type/arch are you using?

2. What version of GoFrame are you using?

3. Can this issue be re-produced with the latest release?

4. What did you do?

中文：gf的项目名称带了-关键字，在 gprc 生成 controller 的时候，controller 的包名也是带 - 的，这个是不符合 go 的包名规范的，而对于项目来说，很多人会以 - 来命名项目，应该将项目名称中带 - 的，替换为 _ 下划线，这样就符合规范了
英文：The project name of gf has the - keyword. When gprc generates controller, the package name of controller also contains -. This does not conform to the package name specification of go. For the project For example, many people will name projects with -, you should replace - in the project name with _ underscore, so that it conforms to the specification

5. What did you expect to see?

6. What did you see instead?

[liangguifeng]

fix pull request: #2630

[liangguifeng]

merge