1.020

• If the "script" property has spaces only (someone might have pressed some spaces by mistake), the CustomProperties class still should recognized it as empty (.equals(""))
  -The default values of the properties were being loaded AFTER loading the user-provided ones. For instance I want to get rid of the subject filter "jenkins >" and I cannot do that, because when I add the property with the empty value, this default takes over. Thus, I submit this PR to change the order in which these data is loaded: first we load the defaults, THEN we load the user-provided values