Internal/fix failing Clarin integration test

dspace-server-webapp/src/test/java/org/dspace/app/rest/security/ClarinShibbolethLoginFilterIT.java

@@ -276,6 +276,9 @@ public void testShouldReturnDuplicateUserErrorLoginWithoutNetId() throws Excepti
                 .andExpect(redirectedUrl("http://localhost:4000/login/duplicate-user?email=" + email))
                 .andReturn().getResponse().getHeader("Authorization");
 
+        // Check if was created a user with such email and netid.
+        EPerson ePerson = checkUserWasCreated(netId, IDP_TEST_EPERSON, email, null);
+        deleteShibbolethUser(ePerson);
     }
 
     // This test is copied from the `ShibbolethLoginFilterIT` and modified following the Clarin updates.