Comment 5 for bug 1606351

Reviewed: https://review.openstack.org/347993
Committed: https://git.openstack.org/cgit/openstack/microversion-parse/commit/?id=1f6eac7c3df048679663919f75c2bcecd3e183a2
Submitter: Jenkins
Branch: master

commit 1f6eac7c3df048679663919f75c2bcecd3e183a2
Author: PollyZ <email address hidden>
Date: Tue Jul 26 15:28:18 2016 -0500

    Convert dict headers and Webob headers into lowercase.

    In the fold_headers function, if the headers behaves like a dict,
    they were being retured unchanged. This would cause issues in the
    later processing to extract the microversion header, which matches
    on lower case strings.

    Convert these headers to lowercase also provide a test case to
    validate the header is being parsed correctly.

    Change-Id: I8501c813d668c0a32905906e4ef3f8c6c6b12de2
    Close-Bug:# 1606351