Move email addresses of sysadmins to paramater.

When we put these all in by default, then people testing things or people
who aren't even us get the mail on their systems configured to email us.
Change-Id: Ib9d4160e0c81151bf040422c89621bc0fcefcd66

modules/exim/manifests/init.pp

@@ -1,4 +1,4 @@
-class exim() {
+class exim($sysadmin=[]) {
   package { 'exim4-base':
     ensure => present;
   }
@@ -30,7 +30,7 @@ class exim() {
     group => 'root',
     mode => 444,
     ensure => 'present',
-    source => 'puppet:///modules/exim/aliases',
+    content => template("exim/aliases.erb"),
     replace => 'true',
   }
 }

modules/exim/templates/aliases.erb

@@ -12,7 +12,8 @@ abuse: root
 noc: root
 security: root
 
-sysadmin: corvus@inaugust.com, mordred@inaugust.com, andrew@linuxjedi.co.uk, devananda.vdv@gmail.com
-root: sysadmin
-gerrit2: sysadmin
-jenkins: sysadmin
+gerrit2: root
+jenkins: root
+<% if sysadmin.length > 0 -%>
+root: <%= sysadmin.join(",") %>
+<% end -%>