Speedup DetectorType lookup #1942

Job	Run time
java_matrix	3s
build (macos-latest)	3m 53s
download_test_data	5s
build (ubuntu-latest)	2m 46s
unit_tests (25)	2m 43s
unit_tests (21)	2m 49s
test_run-groovy	43s
spotbugs	7m 0s
test_decoder	2m 55s
test_clara	3m 59s
test_coatjava (ubuntu-latest, eb-ep)	2m 2s
dependency_analysis	1m 9s
test_coatjava (ubuntu-latest, eb-epc)	1m 55s
test_coatjava (ubuntu-latest, eb-eg)	1m 54s
test_coatjava (macos-latest, eb-ep, ./run-eb-tests.sh -100 electronproton)	3m 41s
test_coatjava (ubuntu-latest, eb-eftpi)	2m 4s
test_coatjava (ubuntu-latest, eb-enc)	2m 0s
test_coatjava (ubuntu-latest, kpp)	2m 57s
release_build	0s
generate_documentation	1m 1s
deploy_web_pages	0s
final	2s
	45m 41s

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