"veyron/services/wsprd/app": Rename "Name" to "Extension"
"veyron/services/wsprd/app": Rename "Name" to "Extension"

This CL addresses a TODO to rename the "Neme" field of
a blessingRequest to "Extension"

Change-Id: I234955ff8c830fa1bd46e199942e5354bda8c427

vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref