Description of problem:
When installing without nova, glance, swift, heat, cinder, horizon and
celiometer, packstack should not try to deploy anything that requires any of
those services.


Version-Release number of selected component (if applicable):
openstack-packstack-2014.1.1-0.31.1.dev1266.el7.centos.noarch

How reproducible:
100%


Steps to Reproduce:
1. sudo packstack --install-hosts=$IP \
 --nagios-install=n \
 --os-ceilometer-install=n \
 --os-cinder-install=n \
 --os-glance-install=n \
 --os-heat-install=n \
 --os-horizon-install=n \
 --os-nova-install=n \
 --os-swift-install=n \
 --provision-demo=n

Actual results:

    192.168.123.31_provision_glance.pp:               [ ERROR ]                   
    Applying Puppet manifests                         [ ERROR ]

    ERROR : Error appeared during Puppet run: 192.168.123.31_provision_glance.pp
    Error: Could not prefetch glance_image provider 'glance': File: /etc/glance/glance-api.conf does not contain all required sections

Expected results:
Deployment succeeds


Additional info:
disabling provision-demo works around the issue.