Make SemTK cardinality checks accessible by RACK tools

[weisenje]

Background:
Users can access cardinality restriction violations (instances with too few/many of a given property) in the SemTK SPARQLgraph UI. We now want to make this violation information accessible to other tools in the RACK ecosystem.

Acceptance Criteria:

• add SemTK Java client call for future use by RITE. DONE: OntologyInfoClient.execGetCardinalityViolations()
• add semtk-python3 call for use by RACK CLI. DONE: semtk3.get_cardinality_violations()
• add RACK CLI call. DONE: (Expose cardinality checker via the cli #988)
• add RACK UI button to directly open SPARQLgraph Explore restriction mode. DONE: (Add cardinality check button to RACK UI #990)
• document on semtk-python3 wiki
• document on RACK CLI wiki - @glguy

[weisenje]

@glguy: semtk3.get_cardinality_violations() is now in place. Let us know if you'll be able to add to RACK CLI for Release 13.

[glguy]

I'll jump on it

[weisenje]

Added "Cardinality checker" button to RACK UI Verify tab - this opens SPARQLgraph directly to the cardinality checker.

SPARQLgraph sometimes times out when querying for cardinality violations (dialog below). @cuddihyge is it possible to increase the timeout to avoid this?

[weisenje]

The above timeout is a general Docker problem - unrelated to cardinality checking - ignoring for now

[weisenje]

@glguy, could you please document the new feature rack data cardinality on the RACK CLI Wiki?