Handling language tags during fulltext search

[tomas-knap]

When searching knowledge base, if there is an exact match, then the language tag in the KB is enforced. But if there is no exact match, fulltext query is executed (which does not take into account language tag). As a result, it may happen, that strange language tags are produced to the output, e.g.: AT225 below (KB should use @en tag)

What I would suggest is that:

• if there is a language tag defined in the KB settings, fulltext query should also use that
• If there is no language tag in KB settings, then it should work as now (use labels in all languages)

Relates with #286

[tomas-knap]

Original motivation:

I discovered one issue: It does not respect the settings for language tags in the knowledge base settings. For example, if I set knowledge base dbpedia as follows to use english labels:

Then I still got in the result some other tags (see the second line for each item - which is for dbpedia) - you can see lt etc.

Tested on file: STMK_2012_LIVEBIRTHS-10lines.csv 2.zip And knowledge bases DBpedia + something

[tomas-knap]

Tested, works