Honor dashboard DISABLED over horizon settings

Change-Id: I3324cdfb46ff2843dee01e00cdf9e46cbd827a70
Closes-Bug: #1350346
Support provider network extension when creating network

This adds the ability for admins to set the provider network
settings when creating a network. This includes the network type,
physical network, and segmentation ID. These options will only be
available if the provider network neutron extension is supported.

Change-Id: I6108504a92a32f067cf151ec103171a7bbb601df
Implements: blueprint quantum-network-provider-types
Closes-Bug: 1223360
Spelling correction in exception

Change-Id: If1053145d3793b538d73a9c27d5eac0e3de7ca70
add Previous link to Project > Stacks table

Stack list API supports a sort direction and sort key which we can
use to paginate back

Following same convention as merged patch:
https://review.openstack.org/#/c/91111/

Change-Id: I511d7d27a6234e1510c7fa3c7f84c007599f3721
Partially-implements: blueprint pagination-add-prev-link
Updated from global requirements

Change-Id: Iaae27dec6af2a9b35290ed2b25b6b6b46a0cf652
Merge "Support provider network extension when creating network"
Imported Translations from Transifex

Change-Id: I722cd2a99a6798e0816707cd8be412443ac7771f
Merge "Spelling correction in exception"
Merge "add Previous link to Project > Stacks table"
Merge "Updated from global requirements"
Merge "Imported Translations from Transifex"
Merge "Honor dashboard DISABLED over horizon settings"