Fix Flake8 style warnings in horizon/

Warnings H904, H307 and H405 are new or considerably changed, and will
be fixed in a separate patch.

Partial-bug: #1347472

Change-Id: Id9325a40d443f77242d3634002789501afbfc35a
Co-Authored-By: Juan M. Olle <juan.m.olle@intel.com>
Imported Translations from Transifex

Change-Id: I171ba7fe7c5a35f3c8aafb1708722411dd94e84e
Merge "Imported Translations from Transifex"
Fix Flake8 style warnings in openstack_dashboard/

Warnings H904, H307 and H405 are new or considerably changed, and will
be fixed in a separate patch.

Closes-bug: #1349820
Partial-bug: #1347472

Change-Id: I4fd28990dacf16f03a4eaa6074ef59c37f1a2c14
Merge "Fix Flake8 style warnings in openstack_dashboard/"
Merge "Fix Flake8 style warnings in horizon/"