Change bidder hint

Bid hint now

{
"uk_UA" : "Hint sring",
"en_US" : "Hint sring"
}

Needed bid hint

{
"msg_id" : "Id from messages yaml",
"message": "Message from messages yaml",
"amount" : 1000,
"currency_ua": "грн",
"currency_en" : "UAH"
}