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

This should fix bug 2071215-1637B3D
The fix was done by removing (commenting out) code which was making ERP5 possible to somehow use offline with the new UI.
Now the possibility is shrinking in favour of backward compatibility.

e.g. `activate(after_path=())` should ignore `after_path`

And move gadget global