route-map: T3632: fix invalid validation regex for extcommunity-rt|soo
route-map: T3632: fix invalid validation regex for extcommunity-rt|soo

Use the validation string/system available within vyos-1x. This also works on
VyOS 1.2 series systems.

vyos/vyos-1x,vyos/vyos-1x,vyos/vyos-1x,vyos/vyos-1x