The same condition is repeated twice (caught by FindBugs.)

javassist fails to find a class when concurrently running process
compresses the class (converts classfile to raw bytes)

the idea of the fix is to make sure to only update rawClassfile and classfile
under lock in getClassFile3, all other places that modify classfile are
already synchronized

when reading the object state, we need to read under lock both classfile and
rawClassFile otherwise we might get an inconsistent state

Fixes #350

Should be "bad field access" not "bad filed access".

classes.

This is a continuation of #271 to speed up the 3.25/26 release. More details on the issue.