tempurl: Deprecate sha1 signatures

We've known this would eventually be necessary for a while [1], and
way back in 2017 we started seeing SHA-1 collisions [2].

There's already a patch for Swfit from 2017[3], and this patch will
update tempest side.

[1] https://www.schneier.com/blog/archives/2012/10/when_will_we_se.html
[2] https://security.googleblog.com/2017/02/announcing-first-sha1-collision.html
[3] https://review.opendev.org/c/openstack/swift/+/525771

Change-Id: I0e9073955604ada493ec64264c6a5932627e1138
2 files changed