Fix docker_monitor memory usage report

Correct memory calculation.
max_mem_percent needs to be divided by 100 to get true percentage.

Author: tonyyzy

cwltool/job.py

@@ -736,7 +736,7 @@ def docker_monitor(self, cidfile, tmpdir_prefix, cleanup_cidfile, process):
                 except ValueError:
                     break
         _logger.info(u"[job %s] Max memory used: %iMiB", self.name,
-                     int((max_mem_percent * max_mem) / (2 ** 20)))
+                     int((max_mem_percent / 100 * max_mem) / (2 ** 20)))
         if cleanup_cidfile:
             os.remove(cidfile)