0.17.9: zip / tar.gz / issues

Release Notes:

Enhancements:

• Twitter4j needs an update (#1393)
• Synonym filter supports Wordnet synonym format.

Bug fixes:

• Synonym filter fails to properly load synonyms (since 0.17.7) (#1392)
• Array out-of-bounds exception with bool filter (#1400)
• Script sorting doesn’t accept parameters (#1382)
• Exception: TokenStream implementation classes or at least their incrementToken() implementation must be final (#1397)
• Search: A failed search request might get overrun when trying another shard (#1403)