Horizon Essex dependencies

[sstent]

On trying to install horizon on our API server, we hit a dependency clash, as horizon is still dependant on the http://yum.griddynamics.net/yum/essex-centos/python-novaclient-2011.3-b1412.noarch.rpm package.

Error: Package: 1:horizon-2012.1-b1398.noarch (openstack-essex)
Requires: python-novaclient