Bug 1034218 - EAR subdeployments are not discovered for DomainDeployment

Added missing line: a subdeployent can be a child of a ManagedServer deployment

(cherry picked from commit d327d3ffccfdde166a746f42b542150fdd70d984)
Signed-off-by: Jirka Kremser <jkremser@redhat.com>