We had been inverting names only if they contained a single comma (for example,
"Silver, Liberty" would be converted to "Liberty Silver"). However, this left
names like "Marriner, Neville, Sir" as simply being passed in their original
comma-delimited order, which had no chance of finding a match in Wikidata.
Instead, concatenate the results in inverse order, no matter how many commas
there are. The test record now contains an example entry for this situation.
Signed-off-by: Dan Scott <firstname.lastname@example.org>