Make priority granularity configurable #599 #819

Job	Run time
tests (Unit tests, test jacoco:report)	3m 50s
tests (Style check, compile com.mycila:license-maven-plugin:check pmd:pmd pmd:cpd pmd:check pmd:c...	2m 10s
tests (OSGi integration, install -P docker-integration-test,osgi-integration-tests -DskipUTs, osg...	6m 14s
tests (Standalone integration 4.0, verify -P docker-integration-test,standalone-integration-tests...	10m 6s
tests (Standalone integration 4.1, verify -P docker-integration-test,standalone-integration-tests...	11m 40s
tests (Standalone integration 5.0-alpha1, verify -P docker-integration-test,standalone-integratio...	10m 36s
tests (Python integration, verify -P docker-integration-test,python-integration-tests -DskipUTs, ...	6m 23s
	50m 59s

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