Simplify multiscale-run #128

Job	Run time
runtime-container-job	1m 15s
builder-container-job	6m 54s
spacktainer-build-job (appositionizer)	13m 22s
spacktainer-build-job (brain-indexer)	19m 2s
spacktainer-build-job (brayns)	1h 10m 58s
spacktainer-build-job (connectome-manipulator)	29m 17s
spacktainer-build-job (functionalizer)	29m 1s
spacktainer-build-job (multiscale-run)	58m 4s
spacktainer-build-job (neurodamus-hippocampus)	25m 41s
spacktainer-build-job (neurodamus-neocortex)	27m 16s
spacktainer-build-job (system-benchmarks)	8m 30s
	4h 49m 20s

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