feat(security): treat negotiation succeed if server is old version

[levy5307]

if the client is new version with authentication and enables it, and server is old version, which doesn't has the rpc code RPC_NEGOTIATION. The client will sends negotiation message when it starts, and server will return error ERR_HANDLER_NOT_FOUND, then the session will be reset.
Here is the corresponding error log:

com.xiaomi.infra.pegasus.client.PException: {version}: com.xiaomi.infra.pegasus.rpc.ReplicationException: ERR_SESSION_RESET: [metaServer=[127.0.0.1:34601, 127.0.0.1:34602, 127.0.0.1:34603],tableName=stat] Unable to connect to the meta servers!
	at com.xiaomi.infra.pegasus.client.PegasusClient.getTable(PegasusClient.java:60)
	at com.xiaomi.infra.pegasus.client.PegasusClient.getTable(PegasusClient.java:46)
	at com.xiaomi.infra.pegasus.client.PegasusClient.set(PegasusClient.java:351)
	at com.xiaomi.infra.pegasus.client.PegasusCli.main(PegasusCli.java:206)
Caused by: com.xiaomi.infra.pegasus.rpc.ReplicationException: ERR_SESSION_RESET: [metaServer=[127.0.0.1:34601, 127.0.0.1:34602, 127.0.0.1:34603],tableName=stat] Unable to connect to the meta servers!
	at com.xiaomi.infra.pegasus.rpc.async.TableHandler.handleMetaException(TableHandler.java:495)
	at com.xiaomi.infra.pegasus.rpc.async.TableHandler.<init>(TableHandler.java:98)
	at com.xiaomi.infra.pegasus.rpc.async.ClusterManager.openTable(ClusterManager.java:152)
	at com.xiaomi.infra.pegasus.rpc.async.ClusterManager.openTable(ClusterManager.java:40)
	at com.xiaomi.infra.pegasus.client.PegasusClient.getTable(PegasusClient.java:57)
	... 3 more

Same with the situation which server disables authentication. In this case, the server will return negotiation_status.SASL_AUTH_DISABLEto client.