UD-235: Added validation for update user password

@andrew00x @evoevodin 
Of course u can! but empty password and missed password is not the same.

You said "and this block of code will execute in this case" what is the "this block of code?"

You can just remove password.isEmpty() check and if password is an empty 
client will get message "Password should contain at least 8 characters" instead of "Password required".