TRT_ReadoutGeometry: removed some duplicated code
Adapted InDetDD::TRT_DetectorManager
to own an instance of InDetDD::TRT_DetElementContainer
rather than InDetDD::TRT_DetElementCollection
. As a result, some duplicated code
between the manager and the element container was removed.
Introduced new accessor InDetDD::TRT_DetectorManager::getDetectorElementContainer()
to facilitate refactoring of the TRT layer building code.
Edited by Vakhtang Tsulaia