Ensure assertion matches dict iter order in test

Fixes a test_linux_ip_lib test that made an assertion
on a command that was called that could fail depending
on the order of the dictionary when it was iterated over.

This patch makes the assertion match the order that the
command is constructed by iterating through the dictionary
as well.

Partial-Bug: #1348818
Change-Id: I7baa518169c193f7e98d38632e1db16eb57ffee7
Raise NotImplementedError instead of NotImplemented

NotImplementedError is the name of the exception
(https://docs.python.org/2/library/exceptions.html).

NotImplemented is the name of a constant
(https://docs.python.org/2/library/constants.html).

It makes no sense to raise a constant. The exception should
be raised instead.

Change-Id: I4969e26eb7b46f008ea3c8bd0093490c425f7069
Closes-Bug: #1339855
Add support for provider-network extension in nuage Plugin

This implements support for creating provider networks
with Nuage plugin.

Implements: blueprint providernet-ext-support-for-nuage-plugin
Change-Id: Ibabc1561fc7b6bd5ea38617f145af1d0d4545a4f
Merge "Add support for provider-network extension in nuage Plugin"
Merge "Ensure assertion matches dict iter order in test"
Merge "Raise NotImplementedError instead of NotImplemented"