Change publication tests slightly to make it easier to test manually

This goes together with Connexions/cnx-archive#254 to make use of test
data in archive so it's easier to test publishing manually.
Create ACL, accept roles and license in publishing

- Create ACL with permission to publish for submitter of new content
- Accept roles and license for the submitter
Merge pull request #84 from Connexions/publishing-acl-roles-license

Publishing ACL, roles and license getters and setters