[#1348] Don't show Add Dataset button on org pages unless authorized

The check_access function was passing the wrong parameter for the org id
so it always returned True.

We are removing the Add Dataset button on the Groups page on #1102

ckan/templates/organization/read.html

@@ -1,7 +1,7 @@
 {% extends "organization/read_base.html" %}
 
 {% block page_primary_action %}
-  {% if h.check_access('package_create', {'organization_id': c.group_dict.id}) %}
+  {% if h.check_access('package_create', {'owner_org': c.group_dict.id}) %}
     {% link_for _('Add Dataset'), controller='package', action='new', group=c.group_dict.id, class_='btn btn-primary', icon='plus-sign-alt' %}
   {% endif %}
 {% endblock %}