WIP: testnode on webrunner with software link
- Some fixes for testnode so that it can run inside webrunner (ie. shorter socket and file paths)
- Software link hack so that software under tests uses software in test node.
- Other bug fixes for test node.
- Some old commits from DREAM distributor, probably not needed or already merged
( this MR is mostly here so that we do not loose track of where this code is ... Some fixes are also in erp5.git )