VPP-235: fixed vat help message for sw_interface_set_l2_bridge
VPP-235: fixed vat help message for sw_interface_set_l2_bridge

Change-Id: Ie2a771abbd579c4ffd9679c157dcf435d91ebf7b
Signed-off-by: Calvin <54de423b91fb12bba812a5d776e4d5ee479487b5@gmail.com>

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