Review request for 6895456: Eliminate dependency on java.io.ObjectStreamClass during boot

[Mandy Chung]

Fixed 6895456: Eliminate dependency on java.io.ObjectStreamClass during boot

Webrev at:
   http://cr.openjdk.java.net/~mchung/6895456/webrev.00/

java.io.ObjectStreamClass is not needed if not doing serialization.  
Move getSignatureClass static method to java.io.ObjectStreamField 
class.   ObjectStreamField is always loaded due to the declaration of 
serialPersistentFields in a few core classes as they have evolved in the 
previous releases.

Thanks
Mandy