Suppress false positives related with utility class inspections.

IntelliJ IDEA inspection for private utility classes seems flawed.

testsuite/src/test/java/io/netty/testsuite/transport/socket/SocketSslEchoTest.java

@@ -252,6 +252,9 @@ public class SocketSslEchoTest extends AbstractSocketTest {
             CLIENT_CONTEXT = clientContext;
         }
 
+        @SuppressWarnings("all")
+        private BogusSslContextFactory() { }
+
         public static SSLContext getServerContext() {
             return SERVER_CONTEXT;
         }
@@ -593,5 +596,8 @@ public class SocketSslEchoTest extends AbstractSocketTest {
         public static char[] getKeyStorePassword() {
             return "secret".toCharArray();
         }
+
+        @SuppressWarnings("all")
+        private BogusKeyStore() { }
     }
 }

transport/src/main/java/com/sun/nio/sctp/SctpStandardSocketOptions.java

@@ -17,6 +17,7 @@ package com.sun.nio.sctp;
 
 import java.net.SocketAddress;
 
+@SuppressWarnings("all")
 public class SctpStandardSocketOptions {
     static {
         UnsupportedOperatingSystemException.raise();