[MINOR] Follow-up from "UpdatePriceTableRPC"

MINOR MERGE REQUEST

Overview

This MR restructures some of the UpdatePriceTableRPC code to adhere to naming conventions. There were methods defined on the host prefixed with managed, however due to the move of the RPC price table into a separate struct with its own mutex, the managed keyword does not apply anymore. This MR moves some of the logic on to the hostPrices struct that holds the mutex.

Issues Closed

Closes #3925 (closed)