Synnefo

cyclades: Add 'public' attribute to ports

Extend ports (NetworkInterface model) with 'public' attribute, to
indicate that the port is connected to a public network without getting
the network from the DB. Add corresponding DB migration and update the
DB models factory....

snf-ci: Search all public networks

When creating a new floating IP try all public networks
until we find one that is not full.

snf_django: Properly chain `exclude' queries

Although chained filters, e.g. filter(p1).filter(p2), can be summed up as
filter(p1, p2), this is not the case with exclude. If you want to exclude
those selected by p1 as well as those selected by p2, you need...

cyclades: Fix list objects in enforce

Convert set back to list, because the code further down requires an
indexable object.

Remove keypath, use common dict operations instead

Replace get_path with dict indexing. Remove unused setting
`CYCLADES_CUSTOMIZE_SERVICES' that used set_path. Remove the util/keypath.py
module.