need to extract plugin zip too, for javax.persistence source and plugin 
need to extract plugin zip too, for javax.persistence source and plugin 


Former-commit-id: cf256dc2e8a5a1ee7bfadfd40e8d53ee5aaa08e0
bfg-repo-cleaner-demos/eclipselink.runtime-bfg-strip-big-blobs,bfg-repo-cleaner-demos/eclipselink.runtime-bfg-strip-big-blobs,bfg-repo-cleaner-demos/eclipselink.runtime-bfg-strip-big-blobs