Unify maximum edit distance across fuzzy and match query to max_edits

[s1monw]

Closes #2565

[clintongormley]

Heya @s1monw

We should probably continue to support the old parameters, even if we remove them from the documentation

[s1monw]

hmm, I kept all old parameters around and deprecated the API getters and setters. This should be fully bw compatible?

[clintongormley]

Apologies - I didn't read the change carefully enough

[clintongormley]

This change should also be applied to the query_string https://github.com/elasticsearch/elasticsearch/blob/master/src/main/java/org/elasticsearch/index/query/QueryStringQueryParser.java#L164 and field https://github.com/elasticsearch/elasticsearch/blob/master/src/main/java/org/elasticsearch/index/query/FieldQueryParser.java#L117 queries.

Also, what should the default be? Currently the min_similarity is 0.5. Change to max_edits: 2?

[clintongormley]

Similarly, change flt default for max_edits to 2?

[clintongormley]

How does max_edits affect fuzzy queries when used on numeric or date fields? Does anybody actually do this? A range would surely be more useful.

[s1monw]

invalid has been fixed in a different issue