Duplicate index entries when using the Infinispan IndexManager query backend

The custom commands driven Query backend does not transform Document Ids using the keyTransformer component: depending on which node is the master, document ids in string form might not match the existing document for the same entry, creating duplicates in the index.

This is user visible only as an unexpected number of matches in an index but should not result in duplicate entries; could have returned less entries than those requested at the current page when using pagination on the query results.