Add supressions for possible warning.

mysql-test/suite/galera/r/galera_var_node_address.result

 call  mtr.add_suppression("WSREP: Stray state UUID msg: .* current group state WAIT_STATE_UUID .*");
 call  mtr.add_suppression("WSREP: Protocol violation. JOIN message sender .* is not in state transfer (.*). Message ignored.");
+call  mtr.add_suppression("WSREP: Sending JOIN failed: -[0-9]+ (Transport endpoint is not connected). Will retry in new primary component.");
 SELECT VARIABLE_VALUE = 4 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size';
 VARIABLE_VALUE = 4
 1

mysql-test/suite/galera/t/galera_var_node_address.test

@@ -8,6 +8,7 @@
 
 call  mtr.add_suppression("WSREP: Stray state UUID msg: .* current group state WAIT_STATE_UUID .*");
 call  mtr.add_suppression("WSREP: Protocol violation. JOIN message sender .* is not in state transfer (.*). Message ignored.");
+call  mtr.add_suppression("WSREP: Sending JOIN failed: -[0-9]+ (Transport endpoint is not connected). Will retry in new primary component.");
 
 SELECT VARIABLE_VALUE = 4 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size';