Moves UoM models, test and data to a new addon in
order to be able to use uom without product.
A simple example is be to be able to use UoM for
timesheets.
This commit only move code, and adapt xml ids
without chaging any feature or functionnal
behavior.
Note: 'product' module now depends on new
'uom' module.
When creating a draft purchase agreement, a reference number was generated even if
we do not click the 'Save' button.
Now, the reference is filled with 'New' at the creation and overided with a proper
reference number after clicking on 'Save'. Also, the prefix depends now of the
requisition type. BOxxxxx for blanket orders, TExxxxx for call for tenders.
XavierDo