Added bzip2 package support on mysqldump backup

The script used by this mysqldump class, mysqlbackup.sh, requires bzcat
which is part of the bzip2 package.

This patch will make sure that bzip2 is installed before setting up the
cron tab job using mysqlbackup.sh

manifests/backup/mysqldump.pp

@@ -21,6 +21,10 @@ class mysql::backup::mysqldump (
   $execpath           = '/usr/bin:/usr/sbin:/bin:/sbin',
 ) inherits mysql::params {
 
+  package { 'bzip2':
+    ensure    => $ensure,
+  }
+
   mysql_user { "${backupuser}@localhost":
     ensure        => $ensure,
     password_hash => mysql_password($backuppassword),
@@ -47,7 +51,7 @@ class mysql::backup::mysqldump (
     user    => 'root',
     hour    => $time[0],
     minute  => $time[1],
-    require => File['mysqlbackup.sh'],
+    require => [File['mysqlbackup.sh'], Package['bzip2']],
   }
 
   file { 'mysqlbackup.sh':