Abigail Hopper's trade association includes Chinese solar companies tied to slave labor
About-face follows Free Beacon report that Disney executives reneged on offer to meet Uyghur groups
Recipients include state-run Xinjiang manufacturer linked to abuses against Uyghurs
China says only 10 died, but activists believe number actually in the dozens
Human rights commissioner Michelle Bachelet delayed report to prioritize 'reaching agreement with Beijing'