Added some parameters to corosync class

Default values are defined as previous commits.

* Added parameters to manage corosync service (running/stopped/unmanaged)

  $manage_service

  $enable_service

* Added parameter to manage corosync service start at boot (true/false)

  $enable_boot

* Added parameters to set totem token timeout and number of retransmissions

  $param_totem_token

  $param_totem_token_retransmit_before_loss_const