FIWARE_Location -> FIWARE::Location

In this particular case, note that I'm using `FIWARE_LOCATION`, not `'FIWARE_Location'`, i.e. I'm using the name of the constant not the literal value (which will be wrong, as you point out).

However, I'm realizing than in all the copies I'm using `'FIWARE_Location'` instead of `FIWARE_LOCATION`, so a fix is needed in these places.