Add missing 'six' dependency to nailgun

Due to the missing entry for 'six' in requirements.txt for nailgun
in some cases old version of six was used (from other packages) which
was causes issues with missing features in older version of six.

Now this dependency has been added.

Change-Id: Ib44dbd02e6d775ca269460d836d9a2c354513e3b
Closes-Bug: #1366728
Loading less via require.js plugin

Get rid of hardcode of styles.less file and make it possible to load
all .less files, including ones in plugins

Change-Id: Ic6e3639c9ad7ab9396911545f1f78515a615a760
Reusable components improvements

Change-Id: I23c3adde84775835d1d4fe9de239eb5ca5a9acbe
Fix for settings validation

Change-Id: Ia7ddf0243abb4d3e4ed760e3e99d1d363eb559c8
Merge "Reusable components improvements"
Merge "Fix for settings validation"
Fix for snapshot button length

Closes-bug: 1376234
Change-Id: I964e6b347631663fd8f482caecf029a29ef19ae0
Introduce NeutronNetworkDeploymentSerializer

Neutron attributes serialization is moved from NetworkManager to
NeutronNetworkDeploymentSerializer.
Versioning is introduced in NeutronNetworkDeploymentSerializer.

The previous code in network/neutron.py checked specifically for 5.1
environments. This caused 6.0 environments to fall back to the
old behavior and set network_type to 'flat' and configure 'physnet'.

Change-Id: I3940d0910c888794f82dd2159727ef5073367916
Closes-Bug: #1357298
Merge "Introduce NeutronNetworkDeploymentSerializer"
Merge "Fix for snapshot button length"
Merge "Loading less via require.js plugin"
Fix for node details dialog

Closes-Bug:#1376616

Change-Id: I222611ab010a2ac0f8f4dab6fd821a3b30c97621
Updated change password dialog up to latest version

 - added DOM manipulations for proper errors display
 - conrols changes for proper work with classNames

Related-to: backbone-to-react
Change-Id: Iac8e22c0448356d04a277ca071e3c18f80724357
Merge "Fix for node details dialog"
Merge "Updated change password dialog up to latest version"
[React] Dialogs

Closes-Bug: #1375615

Related to blueprint backbone-to-react

Change-Id: I1aa6d94e1d1f86460a5ad5ceca3ad580ece47fc2
[React] Healthcheck tab

Related to blueprint backbone-to-react

Change-Id: I4c54b22ef210d84613f85cc61481f629166f7f9a
Fix breadcrumb on renaming

Change-Id: I152407ea0ecae887bda2f24cf48ade26822a5f97
Closes-bug: 1376253
Refactoring JSON serialization of response object

    Swapping DRY code jsonutils.loads(webob.TestResponse.body) with
    webob.TestResponse.json_body property.

Change-Id: I2f4e0cd3f1f8abc209e19491287f3630b1c4e80d
Closes-Bug: #1304967
Merge "[React] Dialogs"