Fix: fixed gossip protocol gossip.SendTransaction() now works

main.go

packages/errors/errors.go

packages/errors/stack.go

plugins/gossip/events.go

plugins/gossip/neighbors.go

plugins/gossip/plugin.go

plugins/gossip/protocol.go

plugins/gossip/protocol_v1.go

plugins/gossip/send_queue.go

plugins/gossip/transaction_processor.go

plugins/gossip/transaction_processor_test.go

plugins/tangle/plugin.go