Fix a fragile spec
Fix a fragile spec

The spec on line 63 of the altered file when run with the seed of 65150
fails due to there already being a configuration for the gem from a
prior test. To alleviate this we're also reseting the configuration at
the after each test runs.

Change-Id: Id73977598fe7807829977722eb6b9d61c1220735

instructure/canvas_statsd,instructure/canvas_statsd