RecExRecoTest_ART_egamma_fromESD : Using the common CaloExtensionBuilder
This will be needed for the egamma from ESD ART test after the !28609 (merged) get merged.
Mentioning @mhodgkin
Edited by Christos Anastopoulos
This will be needed for the egamma from ESD ART test after the !28609 (merged) get merged.
Mentioning @mhodgkin