Upgrade the project system to depend on the latest version of Roslyn

[jmarolf]

This updated to this commit of roslyn. This forces us to bring along several other VS dependencis.

NOTE: Async package made a breaking change forcing 3 tests to be disabled

[jmarolf]

@genlu

[davkean]

Has this been inserted into Preview 2, if so, which build? If not, we can't merge this.

[jmarolf]

Has this been inserted into Preview 2

No Roslyn is currently working on that. Unlikely to happen before Monday.

[genlu]

Thanks!

[genlu]

@davkean I upgraded Roslyn to a build contains the new SetProperty API. But we haven't inserted anything to preview 2 yet, so this PR still can't be merged. Also, IWorkspaceProjectContext can be accessed from background thread now, could you please check if ForegroundWorkspaceProjectContext is still needed?

[davkean]

ForegroundWorkspaceProjectContext is known a issue in master, and you can ignore it. It's already been fixed.

[jmarolf]

NOTE: this PR #4318 also depends on this getting merged.

[davidwengier]

Actually this Roslyn package isn't new enough to contain my changes, and I also need a new CPS package for that PR, so was going to tackle the integration as the last step.

[jmarolf]

Actually this Roslyn package isn't new enough to contain my changes

Fair enough. Once Roslyn insertion into Preview 2 we can take literally the newest package they have in master so that's not a problem. Is the CPS package that we would need to consume published?

[davidwengier]

Yep, it is (>= 16.0.429-pre-gf4f06355f6) but I think Drew still needs a new one at some point, which would be after my changes there, so whoever gets there first wins with that one I guess.

[drewnoakes]

The CPS change we need has been inserted to d16.0stg and a new package is on MyGet.

https://devdiv.visualstudio.com/DevDiv/_releaseProgress?_a=release-environment-logs&releaseId=201112&environmentId=805874

[genlu]

We finally completed the first roslyn insertion for preview 2.
https://devdiv.visualstudio.com/DevDiv/_git/VS/pullrequest/152224?_a=files

Could you update roslyn to 2.11.0-beta2-63529-05 to match the version and merge this?

[jmarolf]

@dotnet/project-system this is safe to merge now as the equivalent roslyn bits are in d16.0stg. Once things are green I am going to merge this.