discover native modules from process.moduleLoadList ...

... instead of using a hard-coded list
As part of the test, I create the temp folder inside the integration folder.  I'm good with removing `.idea`, but not so much with removing `/temp/`.  I'm good with a more specific path though.  See https://github.com/robrich/node-sandboxed-module/blob/master/test/integration/test-all-native-modules.js#L14