Make priority granularity configurable #599 #821

Job	Run time
tests (Unit tests, test jacoco:report)	4m 13s
tests (Style check, compile com.mycila:license-maven-plugin:check pmd:pmd pmd:cpd pmd:check pmd:c...	2m 8s
tests (OSGi integration, install -P docker-integration-test,osgi-integration-tests -DskipUTs, osg...	7m 25s
tests (Standalone integration 4.0, verify -P docker-integration-test,standalone-integration-tests...	12m 22s
tests (Standalone integration 4.1, verify -P docker-integration-test,standalone-integration-tests...	11m 39s
tests (Standalone integration 5.0-alpha1, verify -P docker-integration-test,standalone-integratio...	11m 33s
tests (Python integration, verify -P docker-integration-test,python-integration-tests -DskipUTs, ...	7m 51s
	57m 11s

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