Do not assume order of images
Do not assume order of images

This fixes the test_tag_lifecycle test, which broke with a randomized
PYTHONHASHSEED.

Previously, the test assumed that the values in the list of tag names
would remain constant. The test now sorts the results and compares to a
sorted set.

Change-Id: If5a2ef683fcf55520c7d539f1b90aefaba4739d5
Partial-bug: #1348818

stevelle/glance,paramite/glance,openstack/glance,paramite/glance,JioCloud/glance,ozamiatin/glance,akash1808/glance,klmitch/glance,scripnichenko/glance,takeshineshiro/glance,jumpstarter-io/glance,wkoathp/glance,openstack/glance,redhat-openstack/glance,kfwang/Glance-OVA-OVF,redhat-openstack/glance,stevelle/glance,rajalokan/glance,saeki-masaki/glance,darren-wang/gl,jumpstarter-io/glance,saeki-masaki/glance,akash1808/glance,ozamiatin/glance,JioCloud/glance,klmitch/glance,kfwang/Glance-OVA-OVF,sigmavirus24/glance,scripnichenko/glance,sigmavirus24/glance,vuntz/glance,rajalokan/glance,vuntz/glance,takeshineshiro/glance,darren-wang/gl,dims/glance,wkoathp/glance,openstack/glance,dims/glance