[10/12] mesos git commit: Added overload of process::await that takes and returns single future.

Added overload of process::await that takes and returns single future. Review: https://reviews.apache.org/r/61152 Project: http://git-wip-us.apache.org/repos/asf/mesos/repo Commit: http://git-wip-us.apache.org/repos/asf/mesos/commit/4e8394b4 Tree: http://git-wip-us.apache.org/repos/asf/mesos/tre

[10/12] mesos git commit: Added overload of process::await that takes and returns single future.

Added overload of process::await that takes and returns single future. Review: https://reviews.apache.org/r/61152 Project: http://git-wip-us.apache.org/repos/asf/mesos/repo Commit: http://git-wip-us.apache.org/repos/asf/mesos/commit/15c194b8 Tree: http://git-wip-us.apache.org/repos/asf/mesos/tre