Angular test file needs imports ordered

[radu-matei]

It appears Angular Zone.js needs imports ordered in test.ts - angular/zone.js#404

This means, as it was pointed out by @vdice in #227 (comment), that we currently cannot have the VS Code functionality that automatically orders the imports for that particular file.

But the issue is that, in its current form, the VS Code source.organizeImports cannot be parametrized for a specific file / file type / directory / extension, as it is explained in the relevant VS Code issue - microsoft/vscode#35350

As we'd really like to be able to have the ability for auto ordering the imports, this issue is to keep track of a workaround for adding the functionality, but ignore it for some particular files.

[krancour]

Closing due to staleness, but please do reopen if necessary.