Use VertxLogDelegateFactory for internal Vert.x logging

This is done because I assume that was the original intent,
but also because it avoids the non-zero cost
incurred by Vert.x to look up the various
supported options

extensions/vertx/deployment/src/main/java/io/quarkus/vertx/core/deployment/VertxCoreProcessor.java

@@ -220,6 +220,12 @@ IOThreadDetectorBuildItem ioThreadDetector(VertxCoreRecorder recorder) {
         return new IOThreadDetectorBuildItem(recorder.detector());
     }
 
+    @BuildStep
+    @Record(ExecutionTime.RUNTIME_INIT)
+    void configureLogging(VertxCoreRecorder recorder) {
+        recorder.configureQuarkusLoggerFactory();
+    }
+
     @BuildStep
     @Produce(ServiceStartBuildItem.class)
     @Record(value = ExecutionTime.RUNTIME_INIT)

extensions/vertx/runtime/src/main/java/io/quarkus/vertx/core/runtime/VertxCoreRecorder.java

@@ -69,6 +69,8 @@
 @Recorder
 public class VertxCoreRecorder {
 
+    private static final String LOGGER_FACTORY_NAME_SYS_PROP = "vertx.logger-delegate-factory-class-name";
+
     static {
         System.setProperty("vertx.disableTCCL", "true");
     }
@@ -667,6 +669,13 @@ public static Supplier<Vertx> recoverFailedStart(VertxConfiguration config, Thre
 
     }
 
+    public void configureQuarkusLoggerFactory() {
+        String loggerClassName = System.getProperty(LOGGER_FACTORY_NAME_SYS_PROP);
+        if (loggerClassName == null) {
+            System.setProperty(LOGGER_FACTORY_NAME_SYS_PROP, VertxLogDelegateFactory.class.getName());
+        }
+    }
+
     static class VertxSupplier implements Supplier<Vertx> {
         final LaunchMode launchMode;
         final VertxConfiguration config;