Whitelee wind farm error

[AyrtonB]

Whitelee wind farm is only 539 MW in total, it appears as though there's double counting for the extension - i.e. GBR0002757 is already included in GBR0003981.

	gppd_idnr	name	capacity_mw	latitude	longitude	primary_fuel	other_fuel1
24474	GBR0003489	Whitelee	322	55.6812	-4.2791	Wind	nan
24475	GBR0003981	Whitelee 2	217.02	55.6772	-4.2868	Wind	nan
24476	GBR0002757	Whitelee Windfarm Extension phase 2	109	55.6394	-4.3176	Wind	nan