Remove trigger_file in recovery.conf. Use pg_ctl instead.
Rename recovery_path to recovery_conf.
Try to generalize replication setup a bit:

- use confdir instead of datadir where appropriate

- get rid of postgresql_bootstrapping_done fact, always
  execute Exec['bootstrap-postgresql-slave'] before
  Class['postgresql::server::service']

- rework ordering

We are gettings closer to being able to use this module on other
distributions then RHEL/CentOS.