install: Remove /dev/null redirect for zulip-puppet-apply.
install: Remove /dev/null redirect for zulip-puppet-apply.

The usual output from this command looks like

Notice: Compiled catalog for localhost in environment production in 2.33 seconds
Notice: /Stage[main]/Zulip::Apt_repository/Exec[setup_apt_repo]/returns: current_value 'notrun', should be ['0'] (noop)
Notice: Class[Zulip::Apt_repository]: Would have triggered 'refresh' from 1 event
Notice: Stage[main]: Would have triggered 'refresh' from 1 event
Notice: Applied catalog in 1.20 seconds

which doesn’t seem abnormally alarming, and hiding it makes failures
harder to diagnose.

Signed-off-by: Anders Kaseorg <dfdb7392591db597bc41cf266a9c3bc12a2706e5@zulip.com>

andersk/zulip,zulip/zulip,zulip/zulip,kou/zulip,zulip/zulip,rht/zulip,andersk/zulip,zulip/zulip,kou/zulip,rht/zulip,rht/zulip,andersk/zulip,kou/zulip,rht/zulip,eeshangarg/zulip,eeshangarg/zulip,rht/zulip,eeshangarg/zulip,eeshangarg/zulip,eeshangarg/zulip,andersk/zulip,andersk/zulip,rht/zulip,rht/zulip,andersk/zulip,kou/zulip,zulip/zulip,andersk/zulip,zulip/zulip,eeshangarg/zulip,zulip/zulip,kou/zulip,kou/zulip,kou/zulip,eeshangarg/zulip