RFR [13] JDK-8221882: Use fiber-friendly java.util.concurrent.locks in JSSE

[Xuelei Fan]

Hi,

Could I get the following update reviewed?
     http://cr.openjdk.java.net/~xuelei/8221882/webrev.00/

To benefits from with Fibers [1], there is a need to use explicit locks, 
java.util.concurrent.locks, for synchronization in JSSE and the SunJSSE 
provider.

Most of the update is replacing synchronized blocks with 
java.util.concurrent.locks.ReentrantLock locking/unlocking.

Thanks,
Xuelei
[1]: http://cr.openjdk.java.net/~rpressler/loom/Loom-Proposal.html