We need xml files to report results to MicroBuild. This is what our
build queue expects but must have been broken semi-recently.

Notify the remote workspace of working folder paths in the background

Add cast to prevent the dynamic binder from doing the cast

IVsRunningDocumentTable4.GetDocumentData() returns dynamic, and we
were casting it to an interface. This was going through the C#
runtime binder to do so. We don't need that, and an unrelated change in
VS meant that Microsoft.CSharp.dll isn't ngened, so this was far more
expensive than it should be.

@olegtk and @sharwell get credit for the fix.
Co-authored-by: NOleg Tkachenko <olegtk@microsoft.com>
Co-authored-by: NSam Harwell <sam.harwell@microsoft.com>

LOC CHECKIN | roslyn dev15.6.x | 20180202

This pulls a .Wait() call off the UI thread in solution load scenarios,
since it's not urgent that we notify the OOP process about the working
folder path. We still ensure the unregister/register ordering is
maintained by ordering the Tasks, and if we have to synchronously shut
down the remote persistent storage, we will still wait. That is a rarer
gesture (it happens on solution rename) and is something we can address
if that's needed.

Merge dev15.5.x to dev15.6.x

Lightbulb header accessibility when selected/focused

Choosing dev15.5.x as the base instead.

Choosing dev15.5.x as the base instead.

Add satellite assemblies to Microsoft.NETCore.Compilers

This also lets the colors change appropriately when the theme is
changed.

Locate implementations for reference assemblies using the GAC

Update optimization data to 2.7.0-beta3-62526-01...

Fix command line build error

* Check fully-qualified names for SuppressIldasmAttribute and ReferenceAssemblyAttribute
* Use correct reference location, or fail decompilation if it's not available

Fix and re-enable test that would catch this error

CheckPresenceOfTypeIdentifierAttribute - avoid requesting syntax trees if we know that we already decoded all well-known attributes. (#24576)

Fixes https://devdiv.visualstudio.com/DevDiv/_workitems?id=537870.

Remove the use of Parallel.ForEach in ClsComplianceChecker

Fix problems associated with analyzer timing

There was an issue in the custom PublishWithoutBuilding target that aims to
publish the project without rebuilding anything. It has the same dependencies
as the built-in Publish, but replaces build with Just ResolveReferences having
BuildProjectReferences=false. However, this caused BuildOnlySettings (a
dependency of Build) to not run, and therefore BuildingProject was set to false.
That put ResolveAssemblyReferences into design-time mode where FindSatellites
became false.

This fix is required so that the .deps.json that is generated contains satellite
assembly information. Without that, satellites will not load load on  .NET Core.

There was also a missing dependency on PrepareForPublish, which didn't cause any
issue (yet), but it's now added for completeness.

Also removed a nearby workaround for an unrelated v1 SDK issue with satellite
assemblies. It is no longer needed as Roslyn requires v2+ SDK.