Fix typos in l2 validator error messages
Fix typos in l2 validator error messages

milanlenco/vpp-1,milanlenco/vpp-1,brecode/vpp,rastislavszabo/vpp,rastislavszabo/vpp,rastislavszabo/vpp,milanlenco/vpp-1,rastislavszabo/vpp,brecode/vpp,brecode/vpp,brecode/vpp,rastislavszabo/vpp,rastislavszabo/vpp,milanlenco/vpp-1,brecode/vpp,rastislavszabo/vpp,milanlenco/vpp-1