When doing integration testing of Packstack in the upstream OpenStack gate, we see that the Swift backend for Glance does not seem to work properly.

The Packstack command used to yield this result:
sudo packstack --allinone \
          --debug \
          --default-password="packstack" \
          --os-aodh-install=n \
          --os-ceilometer-install=n \
          --os-gnocchi-install=n \
          --os-cinder-install=n \
          --os-horizon-install=n \
          --nagios-install=n \
          --glance-backend=swift \
          --os-sahara-install=y \
          --os-trove-install=y \
          --provision-demo=y \
          --provision-tempest=y \
          --run-tempest=y \
          --run-tempest-tests="smoke"

We can see the error here:
http://logs.openstack.org/16/285516/2/check/gate-packstack-integration-scenario002-tempest-dsvm-centos7/6b876ba/logs/messages.txt.gz#_Feb_26_20_42_30
===
Feb 26 20:42:30 localhost glance-api: ERROR: Store for scheme swift not found
===

glance-api fails to start because of that error and since it is not running, puppet gets errors when trying to upload an image to glance:
http://logs.openstack.org/16/285516/2/check/gate-packstack-integration-scenario002-tempest-dsvm-centos7/6b876ba/logs/latest/manifests/127.0.0.1_provision_glance.log.txt.gz
====
Debug: Executing '/usr/bin/openstack image create --format shell cirros --public --container-format=bare --disk-format=qcow2 --copy-from=http://download.cirros-cloud.net/0.3.4/cirros-0.3.4-x86_64-disk.img'
Debug: Puppet::Type::Glance_image::ProviderOpenstack: Non-fatal error: 'Execution of '/usr/bin/openstack image create --format shell cirros --public --container-format=bare --disk-format=qcow2 --copy-from=http://download.cirros-cloud.net/0.3.4/cirros-0.3.4-x86_64-disk.img' returned 1: Error finding address for http://127.0.0.1:9292/v1/images: ('Connection aborted.', error(111, 'Connection refused'))'. Retrying for 58 more seconds
Error: Execution of '/usr/bin/openstack image create --format shell cirros --public --container-format=bare --disk-format=qcow2 --copy-from=http://download.cirros-cloud.net/0.3.4/cirros-0.3.4-x86_64-disk.img' returned 1: Error finding address for http://127.0.0.1:9292/v1/images: ('Connection aborted.', error(111, 'Connection refused'))
====

Full logs are available here:
http://logs.openstack.org/16/285516/2/check/gate-packstack-integration-scenario002-tempest-dsvm-centos7/6b876ba/logs/