Change django message storage backends default.

Due to original cookie storage backends have limit 2048 bytes,
change it to fallbackstorage, which could store extra message in
session storage.

Related django storage illustration
https://docs.djangoproject.com/en/1.6/ref/contrib/messages/#module-django.contrib.messages

Closes-Bug: #1168541
Change-Id: Ieed4db962ccdadcb346c8ca7e6e789766f9838e5
Restrict the length of user name input

When updating users, user name should not be greater than 255.

Change-Id: Icf99fc2adec8d3a044cca4486f332593a91474fa
Closes-Bug: #1279579
Imported Translations from Transifex

Change-Id: I9cc93b7c72b439a1630e7673327d2156f641ed12
Do not log keystone token

Previously token values are logged as DEBUG level when a new client
object is instantiated. In other project and clients, token values
are now not logged and is output as *REDACTED* instead.
In Horizon these log lines do not have much meaning and
we can simply remove them.

Change-Id: I67617ac6424907574d79ec2a57b513a548e220d2
Closes-Bug: #1380642
Merge "Change django message storage backends default."
Merge "Imported Translations from Transifex"
Merge "Do not log keystone token"
Disable router HA attribute due to Neutron bug

Change-Id: Iccd0e2dfb545a95cb1b9a809187103bb3a5a76a7
Closes-Bug: #1378525
Merge "Restrict the length of user name input"
Merge "Disable router HA attribute due to Neutron bug"
Merge branch 'master' of https://github.com/openstack/horizon