[concept-insights] Concept id regex not accepting parentheses

[gmjonker]

This:

    conceptInsightsService.getConcept(new Concept(graph, "Reactivity_(psychology)"));

is not accepted by IDHelper.validate(). I think it should, because "Reactivity_(psychology)" is a valid concept name.

Changing

    CONCEPT_ID_REGEX = "^/graphs/[_\\-\\w\\s]*/[_\\-\\w\\s]*/concepts/[_\\-\\w\\s]*$";

to

    CONCEPT_ID_REGEX = "^/graphs/[_\\-\\w\\s]*/[_\\-\\w\\s]*/concepts/[_\\-\\w\\s\\(\\)]*$";

resolves the problem.