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Conflicts:
	snf-cyclades-app/synnefo/db/models.py
	snf-cyclades-app/synnefo/logic/management/commands/backend-modify.py

Due to a bug the was fixed in Python-2.7, in Python-2.6 unicode strings
that are written to sys.stdout (using sys.stdout.write) are not
converted to bytestrings using the file.encoding. Instead
sys.stdout.encoding is set to None, and the default encoding is used. We
solve this by creating a wrapper to stdout, and encoding everything
either with the file encoding, or with the `locale` prefered encoding.

Ignore offline backends when computing the state of the network, since
no notification will be received from them. Also, create no
BackendNetwork for an offline backend. This will be created by
reconcilliation, when the backend gets online again.

Padding should not be considered when counting unavailable entries.

All django apps need a models.py file

Use image_backend context manager to ensure that ImageBackend is always
closed. list_images method did not close the ImageBackend, which
resulted in depletion of the Pithos backend connection pool.

LOGGING has been renamed to LOGGING_SETUP

Use 'factory_boy' library for creating Django ORM objects as test data.
These factories can be used as fixtures replacement since they are
easier to write and maintain.

Refs #3097

Do not allow creation of more than one Bridge or MacPrefix pool, since
we can not handle them yet.

The callpoint takes care of committing.

if part of the request is rejected.

If such a call returns a non-empty list, this means that
the entire call failed due to the actions mentioned in the list.

Signed-off-by: Dimitris Aragiorgis <dimara@grnet.gr>

Signed-off-by: Dimitris Aragiorgis <dimara@grnet.gr>

Signed-off-by: Dimitris Aragiorgis <dimara@grnet.gr>

Make reconcile-servers perform reconciliation only for the specified
backend.