Ignore some PMD complaints in test code

Author: sebbASF

src/main/java/org/apache/commons/net/examples/telnet/TelnetClientExample.java

@@ -41,7 +41,7 @@
  * see the result. Type OPT to see a report of the state of the first 25 options.
  */
 public class TelnetClientExample implements Runnable, TelnetNotificationHandler {
-    private static TelnetClient tc;
+    private static TelnetClient tc; //NOPMD example code
 
     /**
      * Main for the TelnetClientExample.

src/test/java/org/apache/commons/net/daytime/DaytimeTCPClientTest.java

@@ -40,7 +40,7 @@
 
 class DaytimeTCPClientTest {
 
-    private static MockDaytimeTCPServer mockDaytimeTCPServer;
+    private static MockDaytimeTCPServer mockDaytimeTCPServer; //NOPMD
 
     @AfterAll
     public static void afterAll() throws IOException {

src/test/java/org/apache/commons/net/ftp/AbstractFtpsTest.java

@@ -57,8 +57,8 @@
  */
 public abstract class AbstractFtpsTest {
 
-    private static int SocketPort;
-    private static FtpServer EmbeddedFtpServer;
+    private static int SocketPort; //NOPMD test code
+    private static FtpServer EmbeddedFtpServer; //NOPMD test code
     protected static final boolean IMPLICIT = false;
     protected static final long TEST_TIMEOUT = 10000; // individual test timeout
     private static final boolean TRACE_CALLS = Boolean.parseBoolean(System.getenv("TRACE_CALLS"));

src/test/java/org/apache/commons/net/ntp/TestNtpClient.java

@@ -36,7 +36,7 @@
  */
 class TestNtpClient {
 
-    private static SimpleNTPServer server;
+    private static SimpleNTPServer server; //NOPMD test code
 
     @BeforeAll
     public static void oneTimeSetUp() throws IOException {

src/test/java/org/apache/commons/net/tftp/TFTPTest.java

@@ -41,7 +41,7 @@
  */
 class TFTPTest {
     private static final int SERVER_PORT = 6902;
-    private static TFTPServer tftpS;
+    private static TFTPServer tftpS; //NOPMD test code
     private static final File SERVER_DIR = FileUtils.getTempDirectory();
     private static final String FILE_PREFIX = "tftp-";
     private static final File[] FILES = new File[8];