[FIX] l10n_be: multilang translations settings

The translations inside the i18n/ folder are the translations published on
Transifex. It will contains the translatable "general" terms (menus, error
messages, actions...).

The account, taxes, journal names are made translatable thanks to the
l10n_multlang module but it should only be translated in the `spoken_languages`
values (nl_BE for l10n_be). These translations are present in i18n_extra folder
which is not published on Transifex.

Regenerate the translations correctly and populate the nl_BE.po file with
previous translations.

openerp/addons/base/i18n/base.pot

@@ -4,7 +4,7 @@
 #
 msgid ""
 msgstr ""
-"Project-Id-Version: Odoo Server 9.0rc1\n"
+"Project-Id-Version: Odoo Server 9.0\n"
 "Report-Msgid-Bugs-To: \n"
 "POT-Creation-Date: 2015-09-18 09:48+0000\n"
 "PO-Revision-Date: 2015-09-18 09:48+0000\n"