uploader: refactoring of workflow definition

* Refactors the "insert" workflow definitions to conform with
  the standard pattern of workflows. This will also avoid the current
  issue that the workflows registry has the "insert" workflow with key
  None.

Acked-by: Esteban J. G. Gabancho <esteban.gabancho@gmail.com>
Acked-by: Jiri Kuncar <jiri.kuncar@cern.ch>
Signed-off-by: Jan Aage Lavik <jan.age.lavik@cern.ch>
indexer: port of field tokenizer cache

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
search: initial query parser usage

* Adds new record matching API.

* Ports logging and fulltext terms extraction from query string.

* Fixes sorting and ranking with new search engine.

* Ports data cachers.

* NOTE removes Aleph support.