[05/12] mesos git commit: Updated discard handling in `Docker::inspect()`.

Updated discard handling in `Docker::inspect()`. Previously, discards of the `Future` returned by `Docker::inspect()` were only handled at the beginning of each asynchronous continuation in the library function's call chain. This meant that if a Docker CLI command became stuck in between async cal

[05/12] mesos git commit: Updated discard handling in `Docker::inspect()`.

Updated discard handling in `Docker::inspect()`. Previously, discards of the `Future` returned by `Docker::inspect()` were only handled at the beginning of each asynchronous continuation in the library function's call chain. This meant that if a Docker CLI command became stuck in between async cal