fix formMap not init

liuxiaolong

2021-05-19 473af8f9250b35aecbb96b44e044bfa299031460

fix formMap not init

 sbusClient.go

@@ -68,6 +68,7 @@
    if contentType == CONTENT_TYPE_FORM || contentType == CONTENT_TYPE_MULFORM {
        if body != nil {
            req.PostFormMap = make(map[string][]string)
            req.FormMap = map[string][]string{}
            for k,v := range body {
                switch v.(type) {
                case string: