ikev2: fix incorrect api message
ikev2: fix incorrect api message

Type: fix

Change-Id: I9b3f4531070786f583e18609dfae1d95487ce93c
Signed-off-by: Filip Tehlar <9891019d6f5d48a43af8fb71dfec78974db6001d@cisco.com>

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