[fix] default location values on multi-company stock. Patch adapted from the v7
one by Alexandre Fayolle.

The yaml tests are by Alexandre, too. They were replaced by python ones in v7
by Martin Trigaux.
[fix] default location values on multi-company stock
Merge branch 'master' of bzr::lp:ocb-addons/6.1 into ocb-6.1