1.回连慢CASE1:role switch instant到了后slave没有发FHS,导致master主动断开，重新建立连接，浪费了时间

Review Request #4566 — Created July 21, 2022 and updated July 22, 2022, 9:45 a.m. — Latest diff uploaded July 21, 2022, 9:24 p.m.

Information
Owner:	jiangheng
Repository:	Yc3121
Branch:
Bugs:
Depends On:
Reviewers
Groups:
People:	jiangheng, lihaotian, lishiliang

Description

role switch fail后再一次发起role switch，两次都失败后再发detach.

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