Revert "Update to vertx-auth split pkg remediation"

This reverts commit 9f1d78f.

Author: vietj

src/main/java/io/vertx/ext/stomp/StompServerHandler.java

@@ -21,7 +21,7 @@
 import io.vertx.core.Future;
 import io.vertx.core.Handler;
 import io.vertx.core.Vertx;
-import io.vertx.ext.auth.user.User;
+import io.vertx.ext.auth.User;
 import io.vertx.ext.auth.authentication.AuthenticationProvider;
 import io.vertx.ext.stomp.impl.DefaultStompHandler;
 

src/main/java/io/vertx/ext/stomp/impl/DefaultStompHandler.java

@@ -26,7 +26,7 @@
 import io.vertx.core.internal.logging.Logger;
 import io.vertx.core.internal.logging.LoggerFactory;
 import io.vertx.core.shareddata.LocalMap;
-import io.vertx.ext.auth.user.User;
+import io.vertx.ext.auth.User;
 import io.vertx.ext.auth.authentication.AuthenticationProvider;
 import io.vertx.ext.auth.authentication.UsernamePasswordCredentials;
 import io.vertx.ext.stomp.Acknowledgement;