gh-1908 (moving secondary indexes to vinyl.c), moving upsert, review fixes
gh-1908 (moving secondary indexes to vinyl.c), moving upsert, review fixes

rtsisyk/tarantool,rtsisyk/tarantool,rtsisyk/tarantool,mejedi/tarantool,rtsisyk/tarantool,mejedi/tarantool,mejedi/tarantool,mejedi/tarantool