Add update plugin to fill in ipaRangeType attribute
    
    Previously, we deduced the range type from the range objectclass
    and filled in virtual attribute in post_callback phase.
    
    Having a ipaRangeType attributeType in schema, we need to fill
    the attribute values to ranges created in previous IPA versions.
    
    The plugin follows the same approach, setting ipa-local or
    ipa-ad-trust value to the ipaRangeType attribute according
    to the objectclass of the range.
    
    Part of https://fedorahosted.org/freeipa/ticket/3647