backend-api, UserMapStore: заполнение BaseRequest.userId fix unittest

clearing-parent/backend-api/src/main/java/ru/spcex/clearing/backendapi/security/KeycloakUtils.java

@@ -11,6 +11,7 @@ public class KeycloakUtils {
      */
     public static String getUserNameFromAuthentication(Authentication authentication) {
         KeycloakAuthenticationToken auth = (KeycloakAuthenticationToken) authentication;
+        if (auth == null) return null;
         KeycloakAccount details = (KeycloakAccount) auth.getDetails();
         return ((KeycloakPrincipal) details.getPrincipal())
                 .getKeycloakSecurityContext()