Upgrade to Dropwizard Metrics 3.2.3

Closes gh-9745

Author: wilkinsona

spring-boot-dependencies/pom.xml

@@ -70,7 +70,7 @@
 		<couchbase-cache-client.version>2.1.0</couchbase-cache-client.version>
 		<derby.version>10.13.1.1</derby.version>
 		<dom4j.version>1.6.1</dom4j.version>
-		<dropwizard-metrics.version>3.2.2</dropwizard-metrics.version>
+		<dropwizard-metrics.version>3.2.3</dropwizard-metrics.version>
 		<ehcache.version>2.10.4</ehcache.version>
 		<ehcache3.version>3.3.1</ehcache3.version>
 		<embedded-mongo.version>2.0.0</embedded-mongo.version>