fix unit tests after constarints for db added

rest-api/src/test/java/lcsb/mapviewer/api/users/UserRestImplTest.java

@@ -63,6 +63,7 @@ public class UserRestImplTest extends RestTestFunctions {
     try {
       User user = new User();
       user.setLogin(TEST_LOGIN);
+      user.setCryptedPassword("c");
       userService.addUser(user);
       userRestImpl.addUser(TEST_LOGIN, new LinkedMultiValueMap<>());
       fail("Exception expected");
@@ -77,6 +78,7 @@ public class UserRestImplTest extends RestTestFunctions {
   public void testUpdatePreferences() throws Exception {
     try {
       User user = new User();
+      user.setCryptedPassword("");
       user.setLogin(TEST_LOGIN);
       userService.addUser(user);