reduce code duplication in filter-aaaa test

reduce code duplication in filter-aaaa test

cut down the number of identical lines in the filter-aaaa test:
- replace identical test cases with small check functions
  (check_aaaa_only, check_any, check_nodata, etc).
- group those together into large check functions (check_filter,
  check_filter_other_family) that have options for recursive and
  break_dnssec, then run those for each combination of options
  on servers connfigured with filter-aaaa-on-v4 and filter-aaaa-on-v6.