Remove separate deployment of persistence.xml (#563)
Remove separate deployment of persistence.xml (#563)

* Remove separate deployment of persistence.xml

We added a step to explicitly copy persistence.xml because for some reason it
wasn't originally getting deployed to app-engine, resulting in failures on
startup.  However, this file is now included in core.jar and we are now
getting a warning about multiple persistence units with the same name as it
reads the files from both the filesystem and core.jar.

google/nomulus,google/nomulus,google/nomulus,google/nomulus,google/nomulus,google/nomulus