Add OCA as author of OCA addons

In order to get visibility on https://www.odoo.com/apps the OCA board has
decided to add the OCA as author of all the addons maintained as part of the
association.

partner_firstname/__openerp__.py

@@ -36,7 +36,7 @@ Olivier Laurent <olivier.laurent@acsone.eu>
 
 """,
     'version': '1.2',
-    'author': 'Camptocamp',
+    'author': "Camptocamp,Odoo Community Association (OCA)",
     'maintainer': 'Camptocamp, Acsone',
     'category': 'Extra Tools',
     'website': 'http://www.camptocamp.com, http://www.acsone.eu',