Review request for 6810254

[Mandy Chung]

6810254: Lazily instantiate the shared secret access objects

Webrev at:
   http://cr.openjdk.java.net/~mchung/6810254/webrev.00/

sun.misc.Java*Access objects are created at initialization time.  
However, they are not always needed.  They can be instantiated lazily 
when needed.  The fix is to add a static setSharedSecret() method to be 
called by sun.misc.SharedSecrets via reflection when the shared secret 
access object is requested.

Thanks
Mandy