Added missing retrieve of toolhandlearray for DiTauBuilder
Toolhandlearray was not being initialised properly, was causing other data handles to not be accessible. Also fixes issue: https://its.cern.ch/jira/browse/ATLASRECTS-5031
Toolhandlearray was not being initialised properly, was causing other data handles to not be accessible. Also fixes issue: https://its.cern.ch/jira/browse/ATLASRECTS-5031