[devil] Fix forwarder.py to work on newer psutil versions
[devil] Fix forwarder.py to work on newer psutil versions

A breaking API change in psutil may cause on recent versions for our
code to initialize the host forwarder daemon to break, causing the
forwarder to be killed early.

TBR=jbudorick@chromium.org
Bug: chromium:762005
Change-Id: Ib24dc0e5a59f8355589bc0b2214dc8a439896ca9
Reviewed-on: https://chromium-review.googlesource.com/727983
Reviewed-by: Juan Antonio Navarro Pérez <1649bb5e6b9eafe026580e338065dc64ba6b80b2@chromium.org>
Commit-Queue: Juan Antonio Navarro Pérez <1649bb5e6b9eafe026580e338065dc64ba6b80b2@chromium.org>

catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult,catapult-project/catapult