rewrite checkpoint

httpClient.go

@@ -0,0 +1,13 @@
+package jira
+
+import (
+	"io"
+	"net/http"
+)
+
+type HttpClient interface {
+	Delete(url string) (*http.Response, error)
+	GetJSON(url string) (*http.Response, error)
+	Post(url, bodyType string, body io.Reader) (*http.Response, error)
+	Put(url, bodyType string, body io.Reader) (*http.Response, error)
+}