Fix nuage openstack horizon directory name
Fix nuage openstack horizon directory name

Change-Id: I6bb3b7a673c5c5e0a6463c3ad79c5b18bb774597
Closes-Bug: OPENSTACK-2852

nuagenetworks/nuage-openstack-horizon,nuagenetworks/nuage-openstack-horizon,nuagenetworks/nuage-openstack-horizon,nuagenetworks/nuage-openstack-horizon