TrackD3PDMaker: enable flake8 and make code compliant

Enable flake8 and make code compliant.

This merge request affects 1 package:

• PhysicsAnalysis/D3PDMaker/TrackD3PDMaker

This merge request affects 5 files:

• PhysicsAnalysis/D3PDMaker/TrackD3PDMaker/CMakeLists.txt
• PhysicsAnalysis/D3PDMaker/TrackD3PDMaker/python/TrackParticleImpactParameters.py
• PhysicsAnalysis/D3PDMaker/TrackD3PDMaker/python/init.py
• PhysicsAnalysis/D3PDMaker/TrackD3PDMaker/python/xAODTrackD3PDObject.py
• PhysicsAnalysis/D3PDMaker/TrackD3PDMaker/python/xAODTrackSummaryFiller.py

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

CI Result SUCCESS (hash 2a7e99e3)

	Athena	AthSimulation	AthGeneration	AnalysisBase
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
AthGeneration: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 25169]

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

merged

mentioned in commit c3bd93e2

added sweep:ignore label