Updated openstack/openstack
Project: openstack/swift  5709e9532c281066fbda90b776f9cd787fccd0e5
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Ensure swift.source is set for DLO/SLO requests

SLO was setting it sometimes (the PUT path), but not others (the GET
path), and DLO just wasn't doing it at all. One could already
distinguish DLO/SLO internal requests by the user agent, but we should
set swift.source too.

Change-Id: I5d5b7dd49bd1522a9c830d0abd21fff92ae79a39