[FIX] document_ftp: tests: smash those tests with lots of commits.

[FIX] document_ftp: tests: smash those tests with lots of commits.
(Otherwise changes happening on one cursor are not visible to the other one.)
Normally, as those yaml files commit(), they sould be inside demo data
instead of tests. But really we want to test a completely initialized
database, not being executed while the database is being initialized
(as the demo data are). This is just a matter of convention as the
tests are only executed when you also install demo data.

bzr revid: vmt@openerp.com-20111007091737-2dzocv2rgm2gfbi2