Additional INFO log messages on first fg start

[fulv]

Just for the record, the first time a plone instance is started (when there is no blobstorage yet), the following INFO messages are produced in the foreground console log. I'm not sure if it's worth adding these to the plone_training_config/instructions.rst page.

2015-04-28 11:39:51 INFO ZODB.blob (45758) Blob directory `.../var/blobstorage` is unused and has no layout marker set. Selected `bushy` layout.
2015-04-28 11:39:51 INFO ZODB.blob (45758) Blob temporary directory '.../var/blobstorage/tmp' does not exist. Created new directory.

Also, there is this one:

2015-04-28 11:39:55 INFO Plone OpenID system packages not installed, OpenID support not available