[Falcon] Fix SONAR flagged blocker issues

- add comments to suppress two instances where we really do want to catch Throwable
- implement equals() methods where only hashValue() was implemented

Change-Id: Iecfd66ff50fbd433977d1affd74f5f05d0a047e5
diff --git a/utils/netty/src/main/java/org/onlab/netty/NettyMessaging.java b/utils/netty/src/main/java/org/onlab/netty/NettyMessaging.java
index 2dda747..b9709cc 100644
--- a/utils/netty/src/main/java/org/onlab/netty/NettyMessaging.java
+++ b/utils/netty/src/main/java/org/onlab/netty/NettyMessaging.java
@@ -106,6 +106,8 @@
     protected char[] ksPwd;
     protected char[] tsPwd;
 
+    @SuppressWarnings("squid:S1181")
+    // We really need to catch Throwable due to netty native epoll() handling
     private void initEventLoopGroup() {
         // try Epoll first and if that does work, use nio.
         try {