Upgrade to Angular 6

[wmarques]

Still WIP, need to check if I correctly migrated the rxjs imports.
I wanted to remove the rxjs-compat dependency but some libs aren't rxjs6 compliant (ngx-webstorage, ngx-infinite-scroll)...

TODO:

• Migrate angular cli config file to new format
• Upgrade injection using the new DI injection ?

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• Travis tests are green

• Tests are added where necessary

• Documentation is added/updated where necessary

• Coding Rules & Commit Guidelines as per our CONTRIBUTING.md document are followed

[wmarques]

Seems that we cannot use a custom webpack build with angular-cli... When I try to ng eject an Angular 6 app generated with Angular CLI 6, it tells me that the support for ejecthas been removed 😞

[wmarques]

I don't know how to be still angular CLI compliant, it always generate the component under a wrong path even if I specifiy src/main/webappas the root src directory in the angular.json file...

[sendilkumarn]

@wmarques that seems weird, eject is removed in v6, with the idea of using it via angular-cli.json

[sendilkumarn]

@wmarques lets list the issues that we have currently on this probably in a doc, what say?

[wmarques]

@sendilkumarn Yes, strange... If you guys have any idea about adapting the angular.json file to make it work..
Sure, we can merge this once I've resolved the conflict and then I will work on migrating to the new DI injection syntax :)

[wmarques]

@sendilkumarn I just rebased, let's wait for Travis and if you are ok with this you can merge

[wmarques]

Let me rebase again, the travis build fails doesn't seem related to my PR...

[thainan10]

@wmarques have you tried to follow the steps of this Angular helper website to upgrade the version?

[wmarques]

Finally green 🎉

[wmarques]

I think we can merge this if this is ok for you guys and I'll start migrating on the new DI injection system on a next PR, we also need the ng-jhipster lib to migrate

[pascalgrimaud]

Congrats @wmarques for the hard work !

[wmarques]

Well I had enough time to move to the new Dependency Injection so I merged my work on this PR, let me know if you have any feedbacks

[pascalgrimaud]

Travis back to red since your last commit, sorry @wmarques

[jdubois]

@pascalgrimaud it's probably my fault, it's corrected now, @wmarques can you rebase?

[pascalgrimaud]

@wmarques : fyi, there are some conflicts after the merge of your other PR #7634

Update: I used Github interface to resolve the merge conflicts

[jdubois]

This looks all good, let's merge it as this can't be in a separate branch for long (we'll get lots of conflicts)

[sendilkumarn]

@wmarques great work 👏 It would be awesome to get the stats after this

[jdubois]

@wmarques just one issue: when you do some responsive tests (putting the app in a small window, in fact), the menu doesn't show up :-(
This is probably because of your changes, could you check?

[deepu105]

@wmarques does the new DI affect lazy loading? Since many services are in root now?

[wmarques]

@deepu105 I analyzed the generated bundle and it seems that if the module is lazy loaded Angular puts the injected services in this module in the correct bundle so I didn't see any changes in the output.