Hide column on multi_select tables if no actions available.

This patch will add a runtime check to hide/show checkbox columns
on multi_select tables.
Right know the behaviour is calculated once but does not take in account
the dynamic allowed call of each Table Action available.

The change will add 'hidden' class to the first column if table actions
are present but all of them returned False on allowed() call.

Change-Id: Ia4512abe3dbb5de4581673717eb518b2d3a50291
Closes-Bug: #1271194
Fix create instance workflow help typo

Change-Id: If906e02b6114225efaa95e29728d0f285b38a23f
Add missing mock for cinder.default_quota_get

When running tests, I get the following logs:

INFO:requests.packages.urllib3.connectionpool:Starting new HTTP connection (1):
public.nova.example.com

DEBUG:cinderclient.client:Connection refused:
HTTPConnectionPool(host='public.nova.example.com', port=8776): Max retries
exceeded with url: /v1/os-quota-sets/1/defaults (Caused by <class
'socket.gaierror'>: [Errno -2] Name or service not known)

Which signify, that there is a mock missing in the tests.
This patch adds that missing mock.

Change-Id: I4f79f533b729112d11c7165adde2ac751d49f46b
Closes-Bug: #1300141
Cardinal interpolation error

-Seems like for the big numbers, d3 is interpolating
 data badly and it is creating loops in the chart.
 So quick fix is to switch to linear interpolation
 as default.
-Other interpolation can be set with settings.

Change-Id: I82c1514dce6034b3cbc7f95682356a08301482b7
Fixes-bug: #1295537
Merge "Cardinal interpolation error"
Merge "Fix create instance workflow help typo"
Merge "Hide column on multi_select tables if no actions available."
Merge "Add missing mock for cinder.default_quota_get"