Rename backup to bup.

Naming it after what it installs. Also, split the target cronjob into
a define.

Change-Id: I73a4383f529c60bc35c60241dfc91508965d755e
Reviewed-on: https://review.openstack.org/10885
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Reviewed-by: James E. Blair <corvus@inaugust.com>
Approved: Monty Taylor <mordred@inaugust.com>
Tested-by: Jenkins

manifests/init.pp

@@ -0,0 +1,23 @@
+class bup {
+  package { "bup":
+    ensure => present
+  }
+
+  file { "/etc/bup-excludes":
+    ensure => present,
+    content => "/proc/*
+/sys/*
+/dev/*
+/tmp/*
+/floppy/*
+/cdrom/*
+/var/spool/squid/*
+/var/spool/exim/*
+/media/*
+/mnt/*
+/var/agentx/*
+/run/*
+"
+  }
+
+}

manifests/site.pp

@@ -0,0 +1,8 @@
+define bup::site($backup_user, $backup_server) {
+  cron { "bup-$name":
+    user => root,
+    hour => "5",
+    minute => "37",
+    command => "tar -X /etc/bup-excludes -cPf - / | bup split -r $backup_user@$backup_server: -n root -q",
+  }
+}