Refactoring and renaming defined type to sunappserver::config::domain
General refactoring

* Removal of the imq_home parameter, as it is always depending on the
  appserv_installroot parameter.
* Move the configuration of the domain.xml (for IMQ type) to the
  sunappserver::config::domain defined type, as it is a per-domain
  setting.
Merge pull request #15 from bkkrw/master

Cleanup of module structure