Fix silly semantics and bugs. Refactor a bit.
Update dependencies, add tests, improve functionality

  - Update test-kichen version
  - Set default username to dhc-user
  - Calculate tenant from env, use it in connection args
  - Use sslv3 in create
  - Create volume for the instance, attach
  - Start working on assigning floating ip (doesn't seem to
work)
  - Start adding some unit tests