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_relations/__openerp__.py

@@ -21,7 +21,7 @@
 {
     "name": "Partner relations",
     "version": "1.1",
-    "author": "Therp BV",
+    "author": "Therp BV,Odoo Community Association (OCA)",
     "complexity": "normal",
     "description": """
 Introduction