Store rejected roles even if user doesn't accept the license

If the user doesn't accept the license but accepts some roles, the
status of those roles are reset.

Close #155
Merge pull request #156 from Connexions/reject-license-and-roles

Store rejected roles even if user doesn't accept the license
Update copyright_holders when licensors is updated and vice versa
Fix permission issues regarding roles

 - Only give publish permission once a user has accepted the publisher
   role
 - Always give a user view permission if the user has roles awaiting
   acceptance
 - Add test case for partial role acceptance
Merge pull request #157 from Connexions/remove-all-roles

Fix permission issues regarding roles
Move (mostly immutable) testing config into testing package.
Adjust the publishing.url setting to a url without path.
Add testing settings to allow for unmocking archive and publishing.
Framework for intercepting archive and publishing requests.
Adjust travis config to utilize the testing intercepts.