New node verification

[voipp]

hi, Igntrs! when coordinator receives TcpDiscoveryNodeAddedMessage, it mark
message as verified. What for ?
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*Best Regards,*

*Kuznetsov Aleksey*

[yzhdanov]

Coordinator marks the messages as verified for rest of nodes to apply the
changes this message is issued for, i.e. node added message, node failed or
left message are processed by other nodes only after coordinator
verification.

--Yakov