OPENJPA-2662 extract API for PCEnhancer

The old PCEnhancer code is now mostly in PCEnhancerSerp 


git-svn-id: https://svn.apache.org/repos/asf/openjpa/branches/fb-3.0-asm@1760580 13f79535-47bb-0310-9956-ffa450edef68
34 files changed