Fixed dead lock bug caused by hold-time expiry
Fixed dead lock bug caused by hold-time expiry

Signed-off-by: zhouzijiang <3d96be65e79117ba21b7202eced1b0c2c7d9bba2@jd.com>

a16/gobgp,a16/gobgp,fujita/gobgp,a16/gobgp,fujita/gobgp,osrg/gobgp,a16/gobgp,fujita/gobgp,a16/gobgp,a16/gobgp,a16/gobgp,osrg/gobgp,osrg/gobgp,fujita/gobgp,osrg/gobgp