vrrp: vrrp in unicast mode,interface not add virtual ip addresss
vrrp: vrrp in unicast mode,interface not add virtual ip addresss

Type: fix

Signed-off-by: jinsh <524dca5b13c7d949d20113418c7af7fa72624a49@chinatelecom.cn>
Change-Id: Id80601bc753c59c4ea95ff5f74f9b15c40c01e35

chrisy/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp