feat(config-api): replacing testing framework to TestNG #456

Job	Run time
sonar scan (jans-keycloak-link)	1m 8s
sonar scan (jans-keycloak-integration)	1m 7s
sonar scan (jans-auth-server)	1m 5s
sonar scan (agama)	1m 8s
sonar scan (jans-config-api)	1m 10s
sonar scan (jans-core)	1m 6s
sonar scan (jans-linux-setup)	1m 9s
sonar scan (jans-cli-tui)	1m 10s
sonar scan (jans-fido2)	1m 5s
sonar scan (jans-orm)	1m 7s
sonar scan (jans-scim)	1m 6s
sonar scan (jans-pycloudlib)	1m 15s
sonar scan (jans-link)	1m 6s
sonar scan (jans-casa)	1m 7s
sonar scan (jans-lock)	1m 14s
	17m 3s

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