InDetPhysValMonitoring: python 3 fixes

• Relative package imports.

This merge request affects 1 package:

• InnerDetector/InDetValidation/InDetPhysValMonitoring

Adding @goetz ,@sroe as watchers

added InnerDetector master review-pending-level-1 labels

CI Result SUCCESS (hash a4731c34)

	Athena	AthSimulation
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
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 8985]

Clear, approving.

Pavol [as L2 MR shifter]

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

merged

mentioned in commit f50a2029

added sweep:ignore label