[fix] Fixes the process kill call.

Fixing a bug introduced by the 'progress-report' branch in a recent
previous commit. The process object is the result of a tornado spawn, so
the call has to be slightly different than what was there.

nrm/containers.py

@@ -170,7 +170,7 @@ class ContainerManager(object):
             logger.debug("killing %r:", c)
             for p in c.processes.values():
                 try:
-                    p.terminate()
+                    p.proc.terminate()
                 except OSError:
                     logging.error("OS error: could not terminate process.")