Fix E402 (module level import not at top of file) pep8 errors
and no longer ignore new failures.
Trivialfix
Change-Id: If9a202f1f322b5b03966c692e33e94b7c872079b
This patch set aims to move all the code related to DNS integration
from the DB core plugin to the DNS ML2 extension module.
By doing this, this patchset removes the dns related code in
db_base_plugin_v2 and the dns exteions module talks with core plugin
only through the method extension_manager and apply_dict_extend_functions
By properly implementing the generation of the dns_assignment attribute
for ports in the DNS ML2 extension module, this patchset also fixes
https://bugs.launchpad.net/neutron/+bug/1579977
Change-Id: I63afb1a1bfeeb14eefb54681dc64959144deeb25
Closes-Bug: #1579601
Closes-Bug: #1579977