/reviewed-on nexedi/erp5!544

This reverts commit e1fa7611.
The fix was already provided by c1b8fa1a

Firefox doesn't display new line with: white-space: normal

replication test

The /bin/ folder of all extra SR provided by the testnode are added to PATH.
SR must fixed either by moving executables or adding symlinks.

The testnode will stop looking at the parameter list of runTestSuite,
and --firefox_bin/--xvfb_bin are deprecated.

This is part of defining a generic and unique API between the testnode and
the tested software.

-  introduce External Function for Acquisition resolution to get over permissions
-  improve recursive TALES expression support
-  closely follow value resolution from ListBox
-  remove external method for default value resolution

- failure in callable does not throw error
- recursive tales support