vppinfra: fix the memory leak while doing clib_bihash_free
vppinfra: fix the memory leak while doing clib_bihash_free

Type: fix

Signed-off-by: Han Wu <8d461956ba24e059ae76364f6cad73e296f5016c@163.com>
Change-Id: I6ad3c313dcab5ed193c135676c1cebd0a141fea1

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