remove old unused test files

were showing validation errors in netbeans
Merge pull request #10 from kzusy/2.3.x

2.3.x
security integration fixes, cleanup + tests

- remove use GeoNodeDataAccessManager.getAdminRole and refactor to
  direct use of GeoServerRole.ADMIN_ROLE
- add AUTHENTICATED_ROLE to credentials in dbclient (at least we're
  consistent w/ default client but not sure needed)
- speed up DefaultSecurityClientTest by many times
- do not attempt to authenticate internal geoserver root user - some
  geoserver internal calls use this for other checks
- some imports cleanup
Merge remote-tracking branch 'origin/2.3.x' into mapstory-2.3.x