Fix IP scan neighbor API/CLI handling of interval and stale
Fix IP scan neighbor API/CLI handling of interval and stale

Change-Id: I77264c4398e6fad461bb4dc10867a1f9c3accec0
Signed-off-by: John Lo <e676165d137051a9de0d8979abbff6c5d0ccb4f0@cisco.com>

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