refactor(shareReplay): align logic with var names (#2919)
refactor(shareReplay): align logic with var names (#2919)

Change isComplete from being always true to representing whether or not
the source is actually complete.
ReactiveX/RxJS,kwonoj/RxJS,benlesh/RxJS,ReactiveX/rxjs,ReactiveX/rxjs,trxcllnt/RxJS,jayphelps/rxjs,Brocco/RxJS,benlesh/RxJS,martinsik/rxjs,Brocco/RxJS,Brocco/RxJS,martinsik/rxjs,ReactiveX/RxJS,ReactiveX/RxJS,jayphelps/rxjs,martinsik/rxjs,martinsik/rxjs,Brocco/RxJS,benlesh/RxJS,ReactiveX/rxjs,kwonoj/RxJS,jayphelps/rxjs,IgorMinar/RxJS,jayphelps/rxjs,trxcllnt/RxJS,ReactiveX/RxJS,IgorMinar/RxJS,kwonoj/RxJS,trxcllnt/RxJS,trxcllnt/RxJS,kwonoj/RxJS,benlesh/RxJS,jayphelps/rxjs,ReactiveX/rxjs