TalkMapper->getTalksBySpeaker doesn't accept $request
Fix UserMapper::isSiteAdmin().

isSiteAdmin() checks for the 'admin' element of the result of getUsers(), so make sure that we return this column in getUsers().
Merge branch 'akrabat-is_site_admin_fix'
adding a couple of other places where the argument list was incorrect
Merge branch 'dshafik-fix-params'
remove the language field from the talk test; we were incorrectly passing the verbose flag and fixing that has exposed this bug
Merge branch 'api-test-verbose-language'