tests: xlate: Make test input valid

tests: xlate: Make test input valid

Make sure ipset at least accepts the test input by running it against
plain ipset once for sanity. This exposed two issues:

* Set 'hip5' doesn't have comment support, so add the commented elements
  to 'hip6' instead (likely a typo).
* Set 'bip1' range 2.0.0.1-2.1.0.1 exceeds the max allowed for bitmap
  sets. Reduce it accordingly.

Fixes: 7587d1c4b5465 ("tests: add tests ipset to nftables")
Signed-off-by: Phil Sutter <phil@nwl.cc>