2.x: Add Findbugs (#4116)
2.x: Add Findbugs (#4116)


AttwellBrian/RxJava,akarnokd/RxJava,benjchristensen/RxJava,reactivex/rxjava,AttwellBrian/RxJava,artem-zinnatullin/RxJava,artem-zinnatullin/RxJava,ReactiveX/RxJava,NiteshKant/RxJava,ReactiveX/RxJava,NiteshKant/RxJava,reactivex/rxjava,akarnokd/RxJava