Updated openstack/openstack
Project: openstack/horizon  f90f5a33e1538de5d399708eaec4deebbf3e121f
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Fix form error access for django 1.6

In Django 1.6, the _get_errors() method is not available in
django 1.6, while errors is a property on forms that is available.

Partially-implements: blueprint django-1point6
Change-Id: I959fbb50fc33b927251d00ebd70592bb90b92cff