Replace "nova" entries in iptables_manager with "neutron"

In iptables_manager docstrings there are still some references to
nova left from nova/network/linux_net.py.
Remove these references and update the docstrings.

Change-Id: I50813e3050f7f117512bde7c2563ce3410939e54
Closes-Bug: #1389601
Updated from global requirements

Change-Id: I0e0f708a755dcf45e3ce51141d264d8624ec87ba
Imported Translations from Transifex

For more information about this automatic import see:
https://wiki.openstack.org/wiki/Translations/Infrastructure

Change-Id: I78ef4cad31e24dd42e1bf64cad4084887044c533
Merge "Updated from global requirements"
Merge "Imported Translations from Transifex"
Merge "Replace "nova" entries in iptables_manager with "neutron""
Merge branch 'master' of https://github.com/openstack/quantum