Updated openstack/openstack
Project: openstack/tempest  bfa86c6f2e6be257b482aeca1f97c22e6b5faa24

Use random binary data for test images

There have been some complaints that the image api testing does nothing
to verify the actual path of uploading binary image data. Since binary
data is the norm rather than the exception, this patch modifies most
usage of image data to be randomly selected binary data.

Change-Id: I54457ed3aea14b540820b5e451c529831074a7bf