fixed error when statsd metrics have not yet arrived during test initialization
fixed error when statsd metrics have not yet arrived during test initialization

Change-Id: I3158bb52c7d6f8116e1f17b5f0a4768cceb52e3d

srsakhamuri/monasca-ansible-scripts,srsakhamuri/monasca-ansible-scripts,srsakhamuri/monasca-ansible-scripts