FlowableIdmApplicationSecurityTest: Add workaround for spring-project…

…s/spring-ldap#473 which causes LDAP health check to fail:

java.lang.NullPointerException: null
	at java.util.Hashtable.put(Hashtable.java:460)
	at org.springframework.ldap.core.support.SimpleDirContextAuthenticationStrategy.setupEnvironment(SimpleDirContextAuthenticationStrategy.java:42)

modules/flowable-ui-idm/flowable-ui-idm-app/src/test/java/org/flowable/ui/idm/application/FlowableIdmApplicationSecurityTest.java

@@ -47,6 +47,7 @@
 import org.springframework.http.HttpMethod;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
+import org.springframework.test.context.TestPropertySource;
 import org.springframework.test.context.junit4.SpringRunner;
 
 /**
@@ -56,6 +57,8 @@
 @SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
 @AutoConfigureWebClient(registerRestTemplate = true)
 @Import(FlowableIdmApplicationSecurityTest.TestBootstrapConfiguration.class)
+// workaround for https://github.com/spring-projects/spring-ldap/issues/473 until spring-ldap 2.3.3 is released
+@TestPropertySource(properties= {"management.health.ldap.enabled=false"})
 public class FlowableIdmApplicationSecurityTest {
 
     private static final Set<String> ACTUATOR_LINKS = new HashSet<>(