stats: fix race conditions in vpp-api stats client
stats: fix race conditions in vpp-api stats client

Type: fix

Signed-off-by: Arthur de Kerhor <486f055f626e5b98c631e0808ecf6e6b19c71e8b@gmail.com>
Signed-off-by: Dave Wallace <0ed937c0e4b2f09f7bc24acf16cee52b8a199d5f@gmail.com>
Change-Id: Ie5c197f6ec0d41d5e405b22662701d83ad94d29e

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,chrisy/vpp,FDio/vpp