fixed permissions for configured addons (#163)

# Fixed Permisssion Model for Configured Addons
From now on:
- user may connect addon if they have at least READ+WRITE permission.
- user may edit addon if they have connected this addon or they have ADMIN access.

addon_service/common/permissions.py

@@ -60,7 +60,7 @@ def has_object_permission(self, request, view, obj):
             and osf.has_osf_permission_on_resource(
                 request,
                 obj.resource_uri,
-                osf.OSFPermission.ADMIN,
+                osf.OSFPermission.WRITE,
             )
         )