Abort if Future::failure() is called on non-failed Future

Review: https://reviews.apache.org/r/27831/
Adds Revisely to Mesos adopters list.
Fixed MasterAuthorizationTest.DuplicateReregistration test.

Review: https://reviews.apache.org/r/27832
Future::failure should have a const ref return.

Review: https://reviews.apache.org/r/27826
Fixed MasterAuthorizationTest.FrameworkRemovedBeforeRegistration test.
Added Daemon

Review: https://github.com/apache/mesos/pull/29
Fixes YAML header in Mesos containerizer doc.