[xmlunit/xmlunit.net] ccc6bd: MSBuild.NUnit doesn't work on Linux, use <Exec />

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

  Branch: refs/heads/use-xbuild-on-travis
  Home:   https://github.com/xmlunit/xmlunit.net
  Commit: ccc6bd158c8b7b7693c13e633e0419d23673359d
      https://github.com/xmlunit/xmlunit.net/commit/ccc6bd158c8b7b7693c13e633e0419d23673359d
  Author: Stefan Bodewig <ste...@fr...>
  Date:   2015-05-10 (Sun, 10 May 2015)

  Changed paths:
    M .nuget/packages.config
    M src/tests/net-constraints/XMLUnit.Constraints.Test.csproj
    M src/tests/net-core/XMLUnit.Core.Tests.csproj

  Log Message:
  -----------
  MSBuild.NUnit doesn't work on Linux, use <Exec />