SVD tests should be robust to sign ambiguity (#9727)
SVD tests should be robust to sign ambiguity (#9727)

* SVD tests should be robust to sign ambiguity

* Switched tests as Patrick suggested, but the UU^T of the 4th test seems wrong

* Multiply was backwards
danking/hail,danking/hail,danking/hail,hail-is/hail,hail-is/hail,hail-is/hail,hail-is/hail,hail-is/hail,danking/hail,danking/hail,hail-is/hail,hail-is/hail,danking/hail,danking/hail,danking/hail,hail-is/hail