Reviewed-by: andrew, aph

Reviewed-by: chegar, ksrini

Summary: All of the hashing based Map implementations: HashMap, Hashtable, LinkedHashMap, WeakHashMap and ConcurrentHashMap are modified to use an enhanced hashing algorithm for string keys when the capacity of the hash table has ever grown beyond 512 entries. The enhanced hashing implementation uses the murmur3 hashing algorithm along with random hash seeds and index masks. These enhancements mitigate cases where colliding String hash values could result in a performance bottleneck.
Reviewed-by: alanb, forax, dl

Reviewed-by: xdono

Summary: Extend techniques developed for ConcurrentLinkedQueue and LinkedTransferQueue to implement a non-blocking concurrent Deque with interior removes.
Reviewed-by: martin, dholmes, chegar

Reviewed-by: darcy, weijun

6865571: Add a lightweight task framework known as ForkJoin
6445158: Phaser - an improved CyclicBarrier
6865579: Add TransferQueue/LinkedTransferQueue
Reviewed-by: martin, chegar, dice

Summary: Fix all known flaky tests, plus minor maintenance
Reviewed-by: martin, chegar