Implement locking for the users.

smp-angular/src/app/login/login.component.ts

smp-angular/src/app/security/security.service.ts

...in/java/eu/europa/ec/edelivery/smp/data/model/DBUser.java

...ropa/ec/edelivery/smp/data/ui/DeleteEntityValidation.java

...uropa/ec/edelivery/smp/data/ui/enums/SMPPropertyEnum.java

...va/eu/europa/ec/edelivery/smp/logging/SMPMessageCode.java

...uropa/ec/edelivery/smp/services/ConfigurationService.java

.../europa/ec/edelivery/smp/services/ui/UIDomainService.java

...eu/europa/ec/edelivery/smp/services/ui/UIUserService.java

...ivery/smp/services/ui/UIDomainServiceIntegrationTest.java

...ropa/ec/edelivery/smp/auth/SMPAuthenticationProvider.java

...ec/edelivery/smp/auth/SMPAuthenticationProviderForUI.java

...uropa/ec/edelivery/smp/auth/SMPAuthenticationService.java

.../europa/ec/edelivery/smp/config/SMPSecurityConstants.java

.../ec/edelivery/smp/config/UISecurityConfigurerAdapter.java

.../ec/edelivery/smp/config/WSSecurityConfigurerAdapter.java

...ec/edelivery/smp/error/AbstractErrorControllerAdvice.java

...uropa/ec/edelivery/smp/error/UIErrorControllerAdvice.java

...opa/ec/edelivery/smp/ui/internal/DomainAdminResource.java

...uropa/ec/edelivery/smp/ui/internal/UserAdminResource.java