make GraphQL parser more strict around empty lists
make GraphQL parser more strict around empty lists

Reviewed By: tyao1

Differential Revision: D23487821

fbshipit-source-id: a3de132f9713303ff0a8704d75c7eae618b893a5

voideanvalue/relay,kassens/relay,atxwebs/relay,josephsavona/relay,kassens/relay,kassens/relay,yungsters/relay,voideanvalue/relay,facebook/relay,wincent/relay,facebook/relay,kassens/relay,xuorig/relay,atxwebs/relay,xuorig/relay,josephsavona/relay,wincent/relay,yungsters/relay,voideanvalue/relay,wincent/relay,kassens/relay,atxwebs/relay,facebook/relay,wincent/relay,facebook/relay,voideanvalue/relay,xuorig/relay,yungsters/relay,josephsavona/relay,facebook/relay,atxwebs/relay,xuorig/relay,xuorig/relay,wincent/relay,wincent/relay,xuorig/relay,facebook/relay,kassens/relay,voideanvalue/relay,voideanvalue/relay