This is similar to get_clean(), but keeps the original rule order
instead of sorting them.
This is useful for include rules in the preamble, where the order might
be relevant - for example if the first include defines a variable that
is then used or extended in the second include file.
These classes are meant to handle 'include' and 'include if exists'
rules.
Due to restrictions in re_match_include_parse(), some cases in
is_covered_localvars() and is_equal_localvars() can't be reached in the
unittests.
Also, IncludeRule isn't used in aa-logprof (yet?), which means
logprof_header_localvars() result format isn't decided yet, and
therefore not tested.
This means test coverage for the new classes isn't 100% this time ;-)
