Fix for G4AtlasFieldServices_test.py syntax for python 3

Updated ComponentAccumulator configuration tests which dump the configuration to a pickle file. In python3 the output file needs to be explicitly opened in binary mode.
I.e.
f = open('configdump.pkl','wb')
rather than
f = open('configdump.pkl','w')

This merge request affects 1 package:

• Simulation/G4Atlas/G4AtlasServices

Adding @jchapman ,@vpascuzz as watchers

added Simulation master review-pending-level-1 labels

CI Result SUCCESS (hash 7491b5d9)

	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 6079]

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

No outstanding issues, moving along with approval. -L1

merged

mentioned in commit edb735c7

added sweep:ignore label