Fix group on FreeBSD

  The server::backup class don't use the correct information from
  mysql::params about backupdirgroup. Because on FreeBSD the group root
  doesn't exist it should use wheel instead. This difference are
  correctly configure inside mysql::params but not inside server::backup

Author: jas01

manifests/server/backup.pp

@@ -69,7 +69,7 @@
   $backupdir                = undef,
   $backupdirmode            = '0700',
   $backupdirowner           = 'root',
-  $backupdirgroup           = 'root',
+  $backupdirgroup           = $mysql::params::root_group,
   $backupcompress           = true,
   $backuprotate             = 30,
   $backupmethod             = undef,
@@ -88,7 +88,7 @@
   $provider                 = 'mysqldump',
   $maxallowedpacket         = '1M',
   $optional_args            = [],
-) {
+) inherits mysql::params {
 
   if $prescript and $provider =~ /(mysqldump|mysqlbackup)/ {
     warning(translate("The 'prescript' option is not currently implemented for the %{provider} backup provider.",