(#523) handle MCollective::ClientTimeoutError

The default behaviour of perpetually retrying connections is not
suitable for clients, especially ones run as part of some automation as
they might never exit

This respects the connection_timeout configuration option

lib/mcollective/util/natswrapper.rb

@@ -151,6 +151,8 @@ def start(options={})
 
         begin
           @client.connect(options)
+        rescue ClientTimeoutError
+          raise
         rescue
           Log.error("Error during initial NATS setup: %s: %s" % [$!.class, $!.message])
           Log.debug($!.backtrace.join("\n\t"))