fix mistake on muzzle directive

Author: amarziali

dd-java-agent/instrumentation/jetty-client/jetty-client-10.0/build.gradle

@@ -6,6 +6,7 @@ muzzle {
     group = "org.eclipse.jetty"
     module = "jetty-client"
     versions = "[10,12)"
+    javaVersion = "11"
   }
   fail {
     group = "org.eclipse.jetty"

dd-java-agent/instrumentation/jetty-client/jetty-client-9.1/build.gradle

@@ -4,11 +4,26 @@ muzzle {
    * is compiled with Java 11, so we can't validate with muzzle which uses Java 8.
    */
   pass {
+    name = "client"
+    group = "org.eclipse.jetty"
+    module = "jetty-client"
+    versions = "[9.1,10)"
+  }
+  pass {
+    name = "listener"
     group = "org.eclipse.jetty"
     module = "jetty-client"
     versions = "[9.1,10)"
   }
   fail {
+    name = "client"
+    group = "org.eclipse.jetty"
+    module = "jetty-client"
+    versions = "[10,12)"
+    javaVersion = "11"
+  }
+  pass {
+    name = "listener"
     group = "org.eclipse.jetty"
     module = "jetty-client"
     versions = "[10,12)"
@@ -19,6 +34,7 @@ muzzle {
     module = "jetty-client"
     versions = "[,9.1)"
   }
+
   fail {
     group = "org.eclipse.jetty"
     module = "jetty-client"

dd-java-agent/instrumentation/jetty-client/jetty-client-9.1/src/main/java/datadog/trace/instrumentation/jetty_client91/FutureResponseListenerInstrumentation.java

@@ -38,6 +38,11 @@ public Map<String, String> contextStore() {
     return contextStore;
   }
 
+  @Override
+  public String muzzleDirective() {
+    return "listener";
+  }
+
   @Override
   public void methodAdvice(MethodTransformer transformer) {
     transformer.applyAdvice(

dd-java-agent/instrumentation/jetty-client/jetty-client-9.1/src/main/java/datadog/trace/instrumentation/jetty_client91/JettyAddListenerInstrumentation.java

@@ -39,6 +39,11 @@ public String[] helperClassNames() {
     return new String[] {"datadog.trace.instrumentation.jetty_client.CallbackWrapper"};
   }
 
+  @Override
+  public String muzzleDirective() {
+    return "listener";
+  }
+
   @Override
   public void methodAdvice(MethodTransformer transformer) {
     transformer.applyAdvice(

dd-java-agent/instrumentation/jetty-client/jetty-client-9.1/src/main/java/datadog/trace/instrumentation/jetty_client91/JettyClientInstrumentation.java

@@ -49,6 +49,11 @@ public String[] helperClassNames() {
     };
   }
 
+  @Override
+  public String muzzleDirective() {
+    return "client";
+  }
+
   @Override
   public Map<String, String> contextStore() {
     return singletonMap("org.eclipse.jetty.client.api.Request", AgentSpan.class.getName());