BUG-1006 - removal of bulkTransactionCache

- removed bulkTransactionCache - this contract is considered a bad tradeoff:
  Application which invoked rpc bound with device will receive transaction id
  in response. If the app needs to analyze error it is up to app
  - to listen to appropriate errorNotification and
  - to keep track of last input value and pair it by transactionId with
    error notification

Change-Id: Icf38f82986451bc9cd46ce84996fe9631295bc16
Signed-off-by: Michal Rehak <mirehak@cisco.com>