[ews] ValidateCommiterAndReviewer (for commit-queue) should validate emails in case insensitive manner. Some users might have their email in lowercase in contributros.json while it might be in upper case in the bugzilla account. For such cases ValidateCommiterAndReviewer shouldn't fail (e.g.: for Basuke.Suzuki@sony.com in https://ews-build.webkit-uat.org/#/builders/26/builds/1116).
Created attachment 392581 [details] Patch
Committed r257925: <https://trac.webkit.org/changeset/257925> All reviewed patches have been landed. Closing bug and clearing flags on attachment 392581 [details].
<rdar://problem/60088938>