use lambdas in lgging

Author: Daan Hoogland

plugins/user-authenticators/ldap/src/main/java/org/apache/cloudstack/api/command/LdapListUsersCmd.java

@@ -227,11 +227,11 @@ private boolean isACloudStackUser(String username) {
         if (CollectionUtils.isNotEmpty(cloudstackUsers)) {
             for (final UserResponse cloudstackUser : cloudstackUsers) {
                 if (username.equals(cloudstackUser.getUsername())) {
-                    logger.trace("found user {} in cloudstack user {}", username, cloudstackUser.getUsername());
+                    logger.trace("found user {} in cloudstack user {}", username, () -> cloudstackUser.getUsername());
                     rc = true;
                     break;
                 } else {
-                    logger.trace("ldap user {} does not match cloudstack user {}", username, cloudstackUser.getUsername());
+                    logger.trace("ldap user {} does not match cloudstack user {}", username, () -> cloudstackUser.getUsername());
                 }
             }
         }

plugins/user-authenticators/ldap/src/main/java/org/apache/cloudstack/ldap/LdapAuthenticator.java

@@ -283,7 +283,7 @@ Pair<Boolean, ActionOnFailedAuthentication> authenticate(String username, String
                 if (!ldapUser.isDisabled()) {
                     result = _ldapManager.canAuthenticate(ldapUser.getPrincipal(), password, domainId);
                 } else {
-                    logger.debug("user with principal {} is disabled in ldap", ldapUser.getPrincipal());
+                    logger.debug("user with principal {} is disabled in ldap", () -> ldapUser.getPrincipal());
                 }
             } catch (NoLdapUserMatchingQueryException e) {
                 logger.debug(e.getMessage());