Update to Apache Commons Net 3.5

The getReplyStrings() strings is now provided by the base class,
so we do not need to implement it ourselves.

Change-Id: I6a90c3dd11cbc5c7532c2c80f2c81046443b3030

gerrit-patch-commonsnet/src/main/java/org/apache/commons/net/smtp/AuthSMTPClient.java

@@ -84,11 +84,6 @@ public class AuthSMTPClient extends SMTPClient {
     return (SSLSocketFactory) BlindSSLSocketFactory.getDefault();
   }
 
-  @Override
-  public String[] getReplyStrings() {
-    return _replyLines.toArray(new String[_replyLines.size()]);
-  }
-
   @Override
   public boolean login() throws IOException {
     final String name = getLocalAddress().getHostName();