Microsoft-CISL/REEF — pull request #943 by markusweimer (2014-08-14 16:52:35+00:00)
Title: Add active thread logging

Closes #933

* Add utility class `ThreadLogger` that can format and log the currently active Threads.
* Used `ThreadLogger` in `Launcher` and `DefaultClientCloseHandler`

Note that `ThreadLogger` is in a package in the `org.apache` namespace. I suggest we start using that namespace for new classes as we will have to move the whole codebase there eventually anyhow.