Adapt to vertx-core internal packages

Author: vietj

src/main/java/io/vertx/httpproxy/impl/ProxiedRequest.java

@@ -22,9 +22,8 @@
 import io.vertx.core.http.HttpServerRequest;
 import io.vertx.core.http.HttpVersion;
 import io.vertx.core.http.impl.HttpServerRequestInternal;
-import io.vertx.core.impl.ContextInternal;
+import io.vertx.core.internal.ContextInternal;
 import io.vertx.core.net.HostAndPort;
-import io.vertx.core.net.impl.HostAndPortImpl;
 import io.vertx.core.streams.Pipe;
 import io.vertx.httpproxy.Body;
 import io.vertx.httpproxy.ProxyRequest;