Add a test for an improperly formatted range.
Add a test for an improperly formatted range.

Adds tests for range headers that are not properly formatted (i.e. are
not of the form bytes=0-1024).

robbat2/s3-tests,andrewgaul/s3-tests,robbat2/s3-tests,andrewgaul/s3-tests,ceph/s3-tests,ceph/s3-tests