[Jira] Make get_issue_changelog start and limit work. The result will…

… be formatted differently.

atlassian/jira.py

@@ -1086,13 +1086,13 @@ def get_issue_changelog(self, issue_key, start=None, limit=None):
         :return:
         """
         base_url = self.resource_url("issue")
-        url = "{base_url}/{issue_key}?expand=changelog".format(base_url=base_url, issue_key=issue_key)
+        url = "{base_url}/{issue_key}/changelog".format(base_url=base_url, issue_key=issue_key)
         params = {}
         if start:
             params["startAt"] = start
         if limit:
             params["maxResults"] = limit
-        return (self.get(url) or {}).get("changelog", params)
+        return self.get(url, params=params)
 
     def issue_add_json_worklog(self, key, worklog):
         """