Switch install scripts to use apt.zulip.net for ops systems

(imported from commit 3ff243459237ac673c5e8ae23077e628fa07a6b9)

puppet/zulip_internal/manifests/base.pp

@@ -18,7 +18,7 @@ class zulip_internal::base {
   package { $org_base_packages: ensure => "installed" }
 
   apt::source {'zulip':
-    location    => 'http://apt.zulip.com/ops',
+    location    => 'http://apt.zulip.net/ops',
     release     => 'wheezy',
     repos       => 'main',
     key         => 'E5FB045CA79AA8FC25FDE9F3B4F81D07A529EF65',

tools/install-server

@@ -58,7 +58,7 @@ sed -i 's/localhost$/localhost $hostname/' /etc/hosts
 wget -O /root/ops.asc https://zulip.com/dist/keys/ops.asc
 apt-key add /root/ops.asc
 cat >/etc/apt/sources.list.d/zulip.list <<EOF2
-deb http://apt.zulip.com/ops wheezy main
+deb http://apt.zulip.net/ops wheezy main
 EOF2
 apt-get update
 apt-get -y upgrade