LPS-40221 Add users.image.portrait.enumeration.check
LPS-40221 Disable portraits enumeration
LPS-40221 Apply to portal code
LPS-40221 Make it hookable, rename portal.properties key and request parameter, SF
LPS-40221 apply to logo selector
LPS-40221 fix NullPointerException, but we should consider this performance penalty. (for example, adding more information to the image table)
LPS-40221 SF