update src files and synch emphasize-lines for alchemy wiki tutorial

Steve Piercy

2017-06-11 2c0e3e334955574383fa73eaf932931199e13a8a

 docs/tutorials/wiki2/src/models/tutorial/models/__init__.py

@@ -63,6 +63,9 @@
    # use pyramid_tm to hook the transaction lifecycle to the request
    config.include('pyramid_tm')

    # use pyramid_retry to retry a request when transient exceptions occur
    config.include('pyramid_retry')

    session_factory = get_session_factory(get_engine(settings))
    config.registry['dbsession_factory'] = session_factory