BUG-5573: Altering the HandshakePool to have a LinkedBlockingQueue instead of an

BUG-5573: Altering the HandshakePool to have a LinkedBlockingQueue instead of an
ArrayBlockingQueue with size 20. The main difference between
ArrayBlockingQueue and LinkedBlockingQueue is clear from constructor one
has underlying data structure Array and other linkedList.

ArrayBlockingQueue uses single-lock double condition algorithm and
LinkedBlockingQueue is variant of the "two lock queue" algorithm and it
has 2 locks 2 conditions ( takeLock , putLock)

In scenarios that involve adding and removing elemenst LinkedBlockingQueue
performs better than ArrayBlockingQueue.

Change-Id: I08f077552599d663857db2ca6d33a86e3b5eb01e
Signed-off-by: Shuva Kar <shuva.jyoti.kar@ericsson.com>