VPP-1382: Fix ip6 address cann't display completely when show ip6 neighbors
VPP-1382: Fix ip6 address cann't display completely when show ip6 neighbors

Change-Id: Iadfbe3c0d0c6dcec2b4ccf1695bd234358f6969a
Signed-off-by: shubing guo <c82276cae957d1607010c821f74b556ce1464ced@zte.com.cn>

vpp-dev/vpp,chrisy/vpp,vpp-dev/vpp,chrisy/vpp,vpp-dev/vpp,chrisy/vpp,vpp-dev/vpp,FDio/vpp,FDio/vpp,FDio/vpp,vpp-dev/vpp,chrisy/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,vpp-dev/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,FDio/vpp,vpp-dev/vpp