about: get list of file name in trip

Retrieves and sends list of files by trip_id

• Response data to client

Content-Type: application/json
//json body, return list of these json 
{
documents:[
{
doc_id:number[int],
doc_name:string[varchar],
mimetype:string[varchar],
doc_size:number[float],
modified:string[datetime],
},
....
]
}