Disable redis monitoring in the default configuration.

This is to avoid issues where we sniff our own redis traffic and
multiply it. It's safer to disable it by default, and to have the
advanced users enable it.

packetbeat.conf

@@ -85,12 +85,12 @@ device = "any"
   [protocols.mysql]
   ports = [3306]
 
-  [protocols.redis]
-  ports = [6379]
-
   [protocols.pgsql]
   ports = [5432]
 
+  #[protocols.redis]
+  #ports = [6379]
+
 [procs]
 # Uncomment the following line to disable the process monitoring.
 # dont_read_from_proc = true