Change pubsub subscription; do not subscribe to *all* events, only

events that need to be transformed into portal events. This cuts the
number of events received by 50 percent, which keeps pubsub from backing
up on sending the events back. Helpful for really big experiments
(1000+ nodes).

protogeni/event/igevent_daemon.in

 #!/usr/bin/perl -w
 #
-# Copyright (c) 2008-2017 University of Utah and the Flux Group.
+# Copyright (c) 2008-2018 University of Utah and the Flux Group.
 # 
 # {{{GENIPUBLIC-LICENSE
 # 
@@ -164,6 +164,10 @@ my $tuple = address_tuple_alloc();
 if (!$tuple) {
     fatal("Could not allocate an address tuple");
 }
+# We do not want to see events that have already been transformed
+# into events we are sending to the portal.
+%$tuple = ( site => "*" );
+
 if (!event_subscribe($localhandle, \&callback, $tuple)) {
     fatal("Could not subscribe to all events");
 }