Temporary fix for sending batched notifications with one or more wrong registration id#823

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vladgaman wants to merge 3 commits intoRedth:masterfrom

vladgaman:master

Commits on May 11, 2017

Fixed an issue where sending batched notification could potentially not send a notification if one of the registration ids is not valid
vladgaman
committed
Fixed issue with sending batched notifications
vladgaman
committed

Commits on Oct 19, 2017

Added a lock when dequeuing from notifications queue
Vlad Gaman
committed