Updated openstack/openstack
Project: openstack-dev/devstack  cdef3aa4d56823dba0051f99794550f2bb264c9c

devstack.org site updates

Includes:
* Change Precise to Trusty
* Add the new plugin phase
* Remove deprecated config options
* much, much more

Change-Id: I0385f18a3256ad37a611e505e49572f27b3bcc10