blacklistEvents renamed to blacklistIndicators

[zebraf1]

In this commit "polish docs, move to docs dir":

aa88533#diff-5778ab63eb5a74b5b25b27d166c80b32

Algorithm parameter blacklistEvents was renamed to blacklistIndicators without changing the documentation. I understand it was renamed to match the indicators config. Why was doc not updated? I discovered that blacklistEvents were not showing up in engine status and had to check the coding.

See https://actionml.com/docs/h_ur_config#complete-ur-engine-configuration-specification
"blacklistEvents": ["", "", "", ""],

Author @pferrel

[zebraf1]

Even if using blacklistIndicators parameter, I do not get items filtered:

Sending event user 527739 view item ASSET_11637:
{"event":"view","entityType":"user","entityId":"527739","properties":{},"eventTime":"2020-03-23T18:04:45+02:00","targetEntityType":"item","targetEntityId":"ASSET_11637","eventId":"view-527739-ASSET_11637"}
Response: Complete(HttpResponse(201 Created,List(),HttpEntity.Strict(application/json,{"comment":"UR input processed"}),HttpProtocol(HTTP/1.1)))

Fetching recommendations:
{"num":25,"offset":0,"from":0,"user":527739,"fields" ...
Response: Complete(HttpResponse(200 OK,List(),HttpEntity.Strict(application/json,{"result":[{"item":"ASSET_11640","score":0.0},{"item":"ASSET_17436","score":0.0},{"item":"ASSET_8595","score":0.0},{"item":"EPGSHOW_6613_2","score":0.0},{"item":"ASSET_1243","score":0.0},{"item":"ASSET_11637","score":0.0} ...

Query logging:
com.actionml.engines.ur.URAlgorithm Engine-id: telia_ur. Got query:
URQuery(None,None,None,None,None,None,None,None,None,None,None,Some(25),Some(0),None,None)

That's why query.user is None and user history is not used to filter out blacklisted indicator items.

[zebraf1]

fields has been renamed to rules in URQuery since PredictionIO upgrade.

[zebraf1]

My query was using "user" as integer value which caused failure in parseAndValidate.
Passing "user":"527739" resulted in URQuery(Some(527739),None,None,None,None,None,None,None,None,None,None,Some(25),Some(0),None,None)

[zebraf1]

I have updated the docs and created PR: actionml/docs.actionml.com#18