Update Apache Oltu Oauth 2.0 Client to 1.0.0.

-
https://issues.apache.org/jira/secure/ReleaseNote.jspa?projectId=12314420&version=12324671
Update okhttp to 1.5.4.

- https://github.com/square/okhttp/blob/master/CHANGELOG.md
Update retrofit to 1.5.0.

- https://github.com/square/retrofit/blob/master/CHANGELOG.md
Move to snapshot.

- Yes, yes, this is just a bugfix release...
Fix interaction test: use newer interaction.

- Does tvtag remove older interactions?