So bad exception handling in VaadinManagedSecurityConfiguration

[bandris]

Absorbed exceptions may cause headaches.
At least a logger pls.

VaadinManagedSecurityConfiguration.java:

            try {
                applicationContext.getBean(AuthenticationManagerConfigurer.class).configure(auth);
            } catch (Exception ex) {
                throw new IllegalStateException(
                    "No AuthenticationManagerConfigurer found. Either define one, or override the GlobalMethodSecurity.configure(AuthenticationManagerBuilder) method.");
            }

[FearlessHyena]

A better idea would probably be to include the original exception