=doc document java-side handlers

akka-http-tests-java8/src/test/java/AllJavaTests.java

@@ -3,10 +3,14 @@
  */
 
 import akka.http.javadsl.server.HandlerBindingTest;
+import docs.http.javadsl.server.HandlerExampleSpec;
 import org.junit.runner.RunWith;
 import org.junit.runners.Suite;
 
 @RunWith(Suite.class)
-@Suite.SuiteClasses(HandlerBindingTest.class)
+@Suite.SuiteClasses({
+        HandlerBindingTest.class,
+        HandlerExampleSpec.class
+})
 public class AllJavaTests {
 }