Revert "drops change-id: f21d343a3da66f91d5edbe84cd115f34bd931a00"

refs SPOT-909

This reverts commit 62c8055d3ab3adb6a1f3d89dbe6b3dc2401dd75f.
on second thought, having all of the Spot Extended Info keys
be unique seems like a good idea. I cant think of a case where
we would need more than one of the same extended info keys.