Mark manual Infraware form tests as manual, (#5074)

MozReview-Commit-ID: JUNZ0S1I7W9

Upstreamed from https://bugzilla.mozilla.org/show_bug.cgi?id=1340133

View on GitHub: https://github.com/w3c/web-platform-tests/pull/5074

Received on Wednesday, 8 March 2017 14:00:49 UTC