Failover must handle 70100 error code

Driver failover handling is based on 08xxx sql state that indicate a connection exception.
A "KILL CONNECTION" command will return a 70100 that is not automatically handled by failover.
70xxx sql state familly stand for interrupted exception.

specifically 70100 sql state can be issue with different kind of error :

• ER_STATEMENT_TIMEOUT (error 1969)
• ER_QUERY_INTERRUPTED (error 1317)
• ER_CONNECTION_KILLED (error 1927)

The 70100 sql state with error code 1927 (= KILL CONNECTION) must be handled by driver to reconnect automatically WITHOUT relaunching query