Relay: Restore `renderFetched` Default Behavior
Relay: Restore `renderFetched` Default Behavior

Summary: When I rewrote `<RelayRootContainer>` to compose `<RelayRenderer>`, I unintentionally broke the existing behavior of `renderFetched` which defaults to rendering `<Component>`. This brings that default behavior back.

Reviewed By: dougli, josephsavona

Differential Revision: D2570497

fb-gh-sync-id: 65657047cb99405e24c8b2dbe786ef9a18b0bc6d

voideanvalue/relay,apalm/relay,atxwebs/relay,kassens/relay,NevilleS/relay,yungsters/relay,kassens/relay,NevilleS/relay,voideanvalue/relay,wincent/relay,heracek/relay,wincent/relay,gabelevi/relay,venepe/relay,xuorig/relay,cpojer/relay,zpao/relay,dbslone/relay,heracek/relay,venepe/relay,Aweary/relay,voideanvalue/relay,cesarandreu/relay,apalm/relay,iamchenxin/relay,kassens/relay,Aweary/relay,wincent/relay,michaelchum/relay,wincent/relay,Aweary/relay,atxwebs/relay,xuorig/relay,zpao/relay,wincent/relay,facebook/relay,venepe/relay,freiksenet/relay,andimarek/generic-relay,mroch/relay,iamchenxin/relay,freiksenet/relay,heracek/relay,voideanvalue/relay,chirag04/relay,NevilleS/relay,benjaminogles/relay,voideanvalue/relay,facebook/relay,chirag04/relay,josephsavona/relay,benjaminogles/relay,benjaminogles/relay,cpojer/relay,xuorig/relay,atxwebs/relay,chentsulin/relay,facebook/relay,mroch/relay,xuorig/relay,iamchenxin/relay,andimarek/generic-relay,chentsulin/relay,gabelevi/relay,josephsavona/relay,michaelchum/relay,dbslone/relay,yungsters/relay,michaelchum/relay,yungsters/relay,forter/generic-relay,facebook/relay,kassens/relay,chirag04/relay,apalm/relay,chentsulin/relay,wincent/relay,rosskevin/relay,mroch/relay,iamchenxin/relay,freiksenet/relay,cpojer/relay,cpojer/relay,zpao/relay,kassens/relay,rosskevin/relay,josephsavona/relay,cesarandreu/relay,facebook/relay,gabelevi/relay,kassens/relay,xuorig/relay,cesarandreu/relay,andimarek/generic-relay,facebook/relay,voideanvalue/relay,xuorig/relay,atxwebs/relay