Run Lua-based tests from testdir

This removes the need to use -output-directory. At present, test m3ior002
will fail and m3ior001 will hang entirely as the test files assume a different
file structure. Changing this will break the 'live' test suite: I'll see if
I can find a way around that.


git-svn-id: http://www.latex-project.org/svnroot/experimental/trunk@4837 de43f980-851b-0410-b2f7-c40aca1f87e0
Further tidy up after failed experiments with local vars


git-svn-id: http://www.latex-project.org/svnroot/experimental/trunk@4838 de43f980-851b-0410-b2f7-c40aca1f87e0