Merge pull request #194 from DataDog/tyler/wrong-helper-name

Fix wrong class name being injected

Author: tylerbenson

dd-java-agent/instrumentation/servlet-3/src/main/java/datadog/trace/instrumentation/servlet3/FilterChain3Instrumentation.java

@@ -50,7 +50,7 @@ public AgentBuilder instrument(final AgentBuilder agentBuilder) {
                 "io.opentracing.contrib.web.servlet.filter.ServletFilterSpanDecorator$1",
                 "io.opentracing.contrib.web.servlet.filter.TracingFilter",
                 "io.opentracing.contrib.web.servlet.filter.TracingFilter$1",
-                getClass().getName() + "$HttpServlet3Advice$TagSettingAsyncListener"))
+                getClass().getName() + "$FilterChain3Advice$TagSettingAsyncListener"))
         .transform(
             DDAdvice.create()
                 .advice(