Fix swarming_load_test_client.py after ae8085b09e.
Fix swarming_load_test_client.py after ae8085b09e.

Round values to get the right integers.
Make it work on real bots.

R=vadimsh@chromium.org
BUG=

Review URL: https://codereview.appspot.com/97120045

luci/luci-py,luci/luci-py,luci/luci-py,luci/luci-py