Do not exit nodetool repair when receiving JMX NOTIF_LOST

patch by yukim; reviewed by krummas for CASSANDRA-7909
SSL does not work in cassandra-cli.

patch by jasobrown, reviewed by beobal for CASSANDRA-7899
Record the real messaging version in all cases in OutboundTcpConnection

patch by Aleksey Yeschenko; reviewed by Piotr Kołaczkowski for
CASSANDRA-8057
Don't reset nodes' versions when closing IncomingTcpConnections

patch by Aleksey Yeschenko; reviewed by Marcus Eriksson for
CASSANDRA-7734