Log4j vulnerability addressed

SemTK dependencies cleaned of log4j. mvn dependency:tree shows all log4j 2.16.0
Improvements to SemTK to handle Fuseki 4.3.1 (log4j release) different blank node handling and tighter URI format checking
Many dependency upgrades and dependabot pull requests

SPARQLgraph bug fix

Fixed bug reported by Kit that caused an exception when changing a property URI during re-validation

Generic queries and bug fixes

Finish implementing generic query endpoint that uses default stored in nodegroup.
Various bug fixes.

Fixed ingestion parallelization bug

v2.3.0-20211022

Parallelization bug during ingestion.   Fix for RACK Release 8

Items for RACK oct-25 release (fixed tag)

Identical to last release except corrected typo in tag name:

Instance-based path finding
Instance-count graph on the SPARQLgraph explore tab
Improvements to CONSTRUCT queries
GROUP BY and aggregate functions
CDR generator standaloneexecutables.IngestTemplateGenerator
Multiple bug fixes
Nodegroups retain default query type, honored by SPARQLgraph

Items for RACK oct-25 release

Instance-based path finding
Instance-count graph on the SPARQLgraph explore tab
Improvements to CONSTRUCT queries
GROUP BY and aggregate functions
CDR generator standaloneexecutables.IngestTemplateGenerator
Multiple bug fixes
Nodegroups retain default query type, honored by SPARQLgraph

1st gen instance-based path-finding

one-hop instance-based path-finding
assorted minor improvements

bug fix issue #530

Fixed a rare but serious bug in SPARQL generation when there is a subProperty in a namespace not used anywhere else in the query.

Minor fixes e.g. issue 493

Fix handling of NODE_type in certain situations.
Fix bug with dynatree overwhelming browser cookies.
Other minor tweaks.

Bug fix to build process

v2.3.0-20210709

Merge branch 'master' of https://github.com/ge-semtk/semtk