* run jest with `--detectOpenHandles` on CI to figure out what is happening with pauses
* focus tests on jest integration
* force kill child processes in config reload test
* skip flaky suite
* increase timeout for looking for installed packages
* run all tests again
In order to make the license that applies to each file as clear as possible, and to be consistent with elasticsearch, we are adding Apache 2.0 license headers to the top of each file.
Existence of this header is enforced by eslint and tslint and missing headers were automatically added in the last commit by running:
```
node scripts/eslint --fix && node scripts/tslint --fix
```
