Fix copy middleware so that all client-defined object
headers that object servers allow to be persisted are copied.
For example, content-encoding and content-disposition will
now be copied.
Fix treatment of x-fresh-metadata header so that, when it is
used, new object sysmeta is applied to the object copy in the
same way as a copy without x-fresh-metadata.
Remove unnecessary passing of original request headers to
sink PUT request constructor: passing the environ is sufficient
to have the new request inherit the original's headers.
Add tests for this change and to verify that content-type
gets either copied or updated if supplied with the copy
request.
Add tests for x-fresh-metadata treatment.
Closes-Bug: #1391826
Closes-Bug: #1600247
Co-Authored-By: Thiago da Silva <thiago@redhat.com>
Change-Id: I917fb0b4e831c13e04ade1c5e0b9821802dec967
afe3968dd1