CaloClusterCorrection: More python 3 fixes

More fixes for python 3 compatibility.

This merge request affects 1 package:

• Calorimeter/CaloClusterCorrection

Adding @pavol as watcher

added Calorimeter JetEtmiss master review-pending-level-1 labels

CI Result SUCCESS (hash 31c52e38)

	Athena	AthSimulation	AnalysisBase	AthGeneration
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 15529]

The changes are fine and there are no CI issues. Approving.

Jason (L1)

added review-approved label and removed review-pending-level-1 label

merged

mentioned in commit 53eccca0

added sweep:ignore label