[erp5_configurator_standard_categories] Use quantity unit conversion module to define quantity of category and stop using quantity property on categories.

To take into account organisations with multiple establishments and module containing DSNs for other organisations

Only quantity should be set

Proof is indeed it already changed

And update the related view

/reviewed-on !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.