* do it
* set empty child version to parent version
* feat(plugins): use pluginId for loader cache keys
* feat(plugins): apply caching to all js and css files systemjs loads
* remove old code and add comment
* test(plugins): update systemjs hooks tests in line with better caching
* test(plugins): wip - comment out failing backend loader tests
* fix tests and improve comment
* Update public/app/features/plugins/loader/cache.test.ts
Co-authored-by: Levente Balogh <balogh.levente.hu@gmail.com>
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Co-authored-by: Will Browne <will.browne@grafana.com>
Co-authored-by: Levente Balogh <balogh.levente.hu@gmail.com>
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