[xmlunit/xmlunit.net] fb03f3: make AppVeyor build pass again

[GitHub <no...@gi...>]

  Branch: refs/heads/master
  Home:   https://github.com/xmlunit/xmlunit.net
  Commit: fb03f3db03f4893549533d3d760c4e76689e93ad
      https://github.com/xmlunit/xmlunit.net/commit/fb03f3db03f4893549533d3d760c4e76689e93ad
  Author: Stefan Bodewig <ste...@fr...>
  Date:   2015-11-07 (Sat, 07 Nov 2015)

  Changed paths:
    M src/tests/net-constraints/ValidationConstraintsTest.cs

  Log Message:
  -----------
  make AppVeyor build pass again