* CORDA-2721: Fix DJVM CLI installation and runtime scripts.
* Update DJVM documentation to explain about `RuleViolationError`.
* CORDA-2721: Add comment about constants.properties being parsed by DJVM CLI scripts.
* Replace SandboxedRunnable with Function interface.
Remove DJVM from "Key Concepts" release notes.
Update installation of shell tool.
Fix broken sandbox package names.
Make sure we only resolve each class once when loading.
Also remove some unused default parameter values.
Don't discard "bootstrap" sandbox.* classes because SourceClassLoader may need them.
* Restore DJVM to the "Key Concepts" docs.
* Remove all mention of "whitelisting" from the DJVM CLI.