Merge #1976

1976: fix: create same hashes on server and client r=robertkowalski a=robertkowalski

we saw a behaviour with dynamic imports for SSR, when the import
was directly referenced, e.g. with `import(./foo')` instead of
`import('./')` webpack would with create different filehashes in
the moduleMap when the option `usedExports` is enabled.

filenames before hashing in webpack with `usedExports` followed the
pattern: `filename.js|abc`

filenames without `usedExports` are simply the filename: `filename.js`

they are then hashed in webpacks `HashedModuleIdsPlugin.js` with
different results, leading to an incomplete modulesMap

Co-authored-by: Jonas Holland <jonas.holland@new-work.se>

This pull request closes issue # (_put the issue number here_)

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## Current state

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## Changes introduced here

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## Checklist

- [ ] All commit messages adhere to the [appropriate format](https://github.com/angular/angular.js/blob/master/CONTRIBUTING.md#commit) in order to trigger a correct release
- [ ] All code is written in untranspiled ECMAScript (ES 2017) and is formatted using [prettier](https://prettier.io)
- [ ] Necessary unit tests are added in order to ensure correct behavior
- [ ] Documentation has been added

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Co-authored-by: Robert Kowalski <robert.kowalski@new-work.se>

packages/webpack/lib/configs/build.js

@@ -143,7 +143,7 @@ module.exports = function getConfig(config, name, buildDependencies) {
         }),
       ],
       chunkIds: 'natural',
-      usedExports: true,
+      usedExports: false,
       concatenateModules: true,
     },
     plugins: [

packages/webpack/lib/configs/node.js

@@ -156,6 +156,7 @@ module.exports = function getConfig(config, name, buildDependencies) {
     optimization: {
       minimizer: [],
       chunkIds: 'natural',
+      usedExports: false,
     },
     plugins: [
       new LimitChunkCountPlugin({ maxChunks: 1 }),