As the windows package provides odoo from sources alongs with
python 3, the test of the build was failing.
The odoo-bin.exe was not found because py2exe is not used anymore.

Windows firewall is now disabled from package.py to prevent it
from blocking local xmlrpc calls.

Also, the docker containers were removed when package tests were
finished, even when no docker was involved in the process (e.g. only
a windows build).

This commit fixes the test part of the windows build process.