Merge pull request ovn-org#269 from hzhou8/fix_conn_leak_at_monitor_f…

…ailure

Fix connection leak and the cache inconsistency errors caused by it.

client/client.go

@@ -246,6 +246,7 @@ func (o *ovsdbClient) connect(ctx context.Context, reconnect bool) error {
 			for id, request := range db.monitors {
 				err := o.monitor(ctx, MonitorCookie{DatabaseName: dbName, ID: id}, true, request)
 				if err != nil {
+					o.rpcClient.Close()
 					o.rpcClient = nil
 					return err
 				}