* Adds configs for nsjail cfg and firejail profile paths
As suggested by @apmorton
Issue #2845
* Add & improve exec tests with new config changes
* Remove stub. Exports are inmutable so no replacing the internal calls
* Resort back to calling the mapping function in the tests too
* But don't call it in the one function that is testing it
* Expand reach of .local gitignore
* Address @apmorton PR review
The tests are now a mess, so I won't merge,
just in case I get shown how to do it properly
