I cannot find  ENTRY is answer-file, which allows to start this service on controller.
Googling gives me
https://copr.fedoraproject.org/coprs/jruzicka/rdo-juno-epel-7/build/63027/
It seems like package openstack-nova-objectstore 2014.2.1 may be built.

Situation is similar described in http://docs.openstack.org/admin-guide-cloud/content/section_configuring-compute-migrations.html


1. HostA is the Cloud Controller, and should run these services: 
nova-api, nova-scheduler, nova-network, cinder-volume, and nova-objectstore.

2. HostB and HostC are the compute nodes that run nova-compute



Thanks.
Boris.