A field is added to the acceptNodeidentification packet to send an UUID to node
that is connecting. UUID generator is put in the master app.py and called from
election.py, recovery.py and verification.py. Storage node start with an
INVALID_UUID or the previous if exists.


git-svn-id: https://svn.erp5.org/repos/neo/branches/prototype3@416 71dcc9de-d417-0410-9af5-da40c76e7ee4