Comment 9 for bug 2002951

Glance default cirros image increased on November from 16MB to 1GB. Shouldn't be in theory a problem but since this test is blindly copying the full image data into memory, it's becoming a very greedy run.

This test necessarly needs to be refactored so that only metadata is copied in memory or if data has to be compared, this has necessarly has to be done by chunks.