add odbctest.php from OntoWiki
Extend Makefile

- add odbctest command to check ODBC-connection
- add install- and purge-test-environment to setup
  and purge PHPUnit environment (version 3.5.15)
- add --stderr parameter to phpunit call to avoid
  warning about already sent header ...
Fix SysOntLocal.rdf: Anonymous is not a sioc:User!

Because of that, the AppIntegrationTest.php->testGetUsers
failed.