Add statsd instrumentation for contact-search

    Adds statsd counts and times for the contact_search request.

Change-Id: I721b4cfb2ae970bb37e6c072940f0496aa90458e
Reviewed-on: https://code.brigade.zone/28774
Tested-by: Leeroy Jenkins <[email protected]>
Reviewed-by: Dave Kincade <[email protected]>

web.py

@@ -208,6 +208,7 @@ def find_voter(id):
 
 
 @app.route('/v1/voters/contact_search', methods=['POST'])
+@statsd.timed('verifier.response_time.contact_search')
 @validate_api_request
 def contact_search(params):
   """ Match voter records by name, phone and email """