Fix an issue in format_vxlan_gpe_tunnel
Fix an issue in format_vxlan_gpe_tunnel

Change-Id: Ib283c75505b787f715e34f5b325dda8a6c2fa125
Signed-off-by: Hongjun Ni <e6547d24d7149371d2bb4b8f7cc3ef66745c46d6@intel.com>

vpp-dev/vpp,GabrielGanne/vpp-flowtable,vpp-dev/vpp,chrisy/vpp,milanlenco/vpp,chrisy/vpp,milanlenco/vpp,vpp-dev/vpp,chrisy/vpp,muharif/vpp,milanlenco/vpp,GabrielGanne/vpp-flowtable,FDio/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,muharif/vpp,chrisy/vpp,FDio/vpp,muharif/vpp,GabrielGanne/vpp-flowtable,muharif/vpp,FDio/vpp,milanlenco/vpp,vpp-dev/vpp,GabrielGanne/vpp-flowtable,chrisy/vpp,FDio/vpp,GabrielGanne/vpp-flowtable,vpp-dev/vpp,muharif/vpp,chrisy/vpp,FDio/vpp,milanlenco/vpp,milanlenco/vpp,vpp-dev/vpp,vpp-dev/vpp,chrisy/vpp,FDio/vpp,muharif/vpp,GabrielGanne/vpp-flowtable