Normalize OpenID URLs with http:// prefix

Gerrit used to violate OpenID 1.1 and 2.0, both of which require
OpenIDs to be normalized (http:// added). Gerrit now normalizes
OpenIDs before checking whether they are permitted.

Bug: issue 1019
Change-Id: I5e75e7d5782ec400adaacbe26f602b46f502709b
(cherry picked from commit e9c3992898b63d5333077b22cd3eeadc6fdb50b1)
1 file changed