The JUnit tests of policy-engine are not independent of execution order. At least the following dependencies are found in org.onap.policy.pdp.rest.api.test.PolicyEngineServicesTest:

• listPolicyTest() requires System property "xacml.rest.pdp.config" to be "config" to pass, but does not ensure it in any way - if any test case that sets the property  to "src/test/resources/config_testing" is executed before listPolicyTest(), it fails
• actionDecisionPolicyCreationTests(), createUpdateDictionaryTests(), deletePolicyTest() and getMetricsTest() all require the very suspicious static PAPServices.isJunit parameter to be false to pass, but do not ensure it in any way. If any test case executed before any of these leaves it to true, these test cases will fail