Send better metadata to server for cache tracking

DryDock Effort: Enabling Skipped tests for rename features

Unskipping remaining skipped tests in CSharp.UnitTests

Fix for #9274: adding empty VB file to sample

Additional fixes to install scripts...

...to deal with various error conditions.

Unskip EE tests

Insert traces for cases when completion can not have a session.

Clean-up skipped tests in Roslyn.Compilers.VisualBasic.Emit.UnitTests.DLL

Install script fixes...

Fix runner_util paths

Merge stabilization into master

Unskip InteractiveUsingTests.AliasHiding

DryDock Effort : Enabling skipped test with current behavior

Mapping the skipped test with a valid workitem link

Convert bootstrap.csx to bat file...

Enabling skipped tests marked with xunit

Fix flaky ForegroundNotificationServiceTests.Test_Delay

Bump the Roslyn.Build.Util version to 0.9.3-portable

If the csi on my machine gets corrupted by patching, I'd still like the
bootstrap to work so I can get a csi and install.csx back to a good state.

Update Syntax Visualizer projects to use same metadata version as Roslyn 1.0

Only create one instance of each incremental analyzer...

Unskipping tests in CSharp.UnitTests