This commit adds the following public methods to RedisAtomicInteger,
RedisAtomicLong, and RedisAtomicDouble:
T accumulateAndGet(T updateValue, BinaryOperator<T> accumulatorFunction);
T getAndAccumulate(T updateValue, BinaryOperator<T> accumulatorFunction);
T updateAndGet(UnaryOperator<T> updateFunction);
T getAndUpdate(UnaryOperator<T> updateFunction);
These methods are primarily useful for doing CAS operations with the
help of Binary/UnaryOperators to generate the new value. They mirror
their counterparts on the AtomicInteger and AtomicLong classes
available in the java.util.concurrent.atomic package.
Original pull request: #362.