This change will cause our bootstrap build to fail if a threshold of server connection failures
occur.  The threshold is chosen a bit arbitrarily as valid failures can occur.  But 15 seems like
a number to warrant an investigation.  If this produces too many false positives it will be
adjusted appropriately.

The bootstrap configuration files were added when we had static config files checked into the repo.  Now that the config files are auto-generated with correct binding redirects (based off of the current build version) these are unneccesary.

Local functions have already implemented their own frame management,
including frame pointer "capturing" (which is implemented by passing a
list of frames to the local function by-ref, rather than traditional
lambda capturing which is implemented by keeping a linked list of frame
pointers to parent frames).

PR #14736 wired up local function lowering to the lambda frame pointer
machinery, which is necessary for when a local function is captured by a
lambda or converted to a delegate, but in the process it diverted
control flow for pure local function capturing to the frame pointer
machinery, which can't handle the structure of local function struct
frame pointers.

This PR resolves the issue by restoring the control flow for local
functions capturing other local functions with by-ref struct frames.

Fixes #15599

Scripting on .NET Core 1.1

fixed 2 bugs reported on primary workspace

Push task queue to CPSProject

Updating the test projects to specifiy `shadowCopy=false` and to reference the VS test adapter package.

Update versions in post-dev15 branch to 2.1.0-beta1

Handle all expression-bodied members correctly in TryGetActiveTokens

Account for the fact that ```Not <null of Boolean?>``` is not true.

1. filter out projects that is not supported in remote host when calculating checksum
2. wrong validation on contract

unit test added

Set an appropriate title on the FindRefs window in response to new editor API changes.

Subclass the editor's BlockTag so we can pick up some heuristic changes they're making on their end.

Add Razor Language Service IVT shims

added navigate to, FAR OOP options to Roslyn Option page

Removing the last packages.config and replacing them with project.json

Instrument the body of an expression-bodied lambda for dynamic analysis

Fixes #15223.