R1:7196d29c0c57

Fix query types on maniphest fulltext search.

Summary:
Parameter `type` is not used anywhere. Instead param `types` is used.
Due this bug search was performed over whole index instead on tasks only.

Test Plan:
- Setup phabricator to run with Elasticsearch.
- Open http://yourphab.com/conduit/method/maniphest.query/
- Fill `fullText` field only.
- Expect get results. Query should be performed on `/phabricator/TASK/` only (not on whole `/phabricator/` index).

Reviewers: epriestley, #blessed_reviewers…