Add Azure AD support to Explorer (#641) #640

Job	Run time
build-and-test-nflow-explorer	2m 43s
build-and-test (17)	57s
build-and-test (21)	37s
integration-tests (17, h2)	3m 46s
javadoc-spotbugs-codeql	4m 13s
build-and-test (22)	55s
integration-tests (17, mariadb)	4m 18s
integration-tests (17, postgresql)	4m 13s
integration-tests (17, mysql)	4m 29s
integration-tests (17, sqlserver)	4m 37s
integration-tests (17, db2)	5m 56s
integration-tests (17, oracle)	4m 47s
integration-tests (21, h2)	3m 48s
integration-tests (21, mariadb)	4m 19s
integration-tests (21, postgresql)	3m 59s
integration-tests (21, mysql)	4m 26s
integration-tests (21, sqlserver)	4m 53s
integration-tests (21, db2)	6m 17s
integration-tests (21, oracle)	4m 55s
	1h 14m 8s

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