Merge branch 'HIJR-4-11-18' into '21.0'

Fix for HIP mode (ATLHI-233)

See merge request atlas/athena!15644

(cherry picked from commit d9ee22f9279ed419a36866afb7362e7a87bc5322)

9c9f4228 Fix for HIP mode (ATLHI-233)

Reconstruction/HeavyIonRec/HIJetRec/share/HIJetRec_jobOptions.py

 from HIJetRec.HIJetRecFlags import HIJetFlags
 from HIGlobal.HIGlobalFlags import jobproperties
 from JetRec.JetRecFlags import jetFlags
+from HIJetRec.HIJetRecConfig import *
 jetFlags.useCells.set_Value(True);