Reverse a error message change

Signed-off-by: Lars Geyer-Blaumeiser <lars.blaumeiser@cofinity-x.com>

Author: lgblaumeiser

api/authentication/src/main/java/org/eclipse/tractusx/bdrs/api/directory/authentication/CredentialBasedAuthenticationService.java

@@ -97,7 +97,7 @@ private boolean performCredentialValidation(List<String> authHeaders) {
                     .onFailure(f -> monitor.warning("Error validating BDRS client VP: %s".formatted(f.getFailureDetail())))
                     .succeeded();
         } catch (EdcException e) {
-            monitor.warning("Error validating the BDRS client VP: %s".formatted(e.getLocalizedMessage()));
+            monitor.warning("Error validating BDRS client VP: %s".formatted(e.getLocalizedMessage()));
             return false;
         }
     }

api/authentication/src/test/java/org/eclipse/tractusx/bdrs/api/directory/authentication/CredentialBasedAuthenticationServiceTest.java

@@ -84,7 +84,7 @@ void isAuthenticated_vpInvalid() {
                 .thenReturn(Result.success(VerifiablePresentation.Builder.newInstance().type("VerifiablePresentation").build()));
 
         assertThat(service.isAuthenticated(Map.of("Authorization", List.of("Bearer " + createSerializedJwt())))).isFalse();
-        verify(monitor).warning(startsWith("Error validating the BDRS client VP"));
+        verify(monitor).warning(startsWith("Error validating BDRS client VP"));
     }
 
     private String createSerializedJwt() {