Description
We should move out GremlinScriptChecker from org.apache.tinkerpop.gremlin.groovy.jsr223 (gremlin-groovy) to org.apache.tinkerpop.gremlin.language (gremlin-core).
This is because the Script checker has nothing to do with groovy and in a future world where Gremlin language would be parsed using a parser (instead of groovy compiler), this class would still be useful.