Doc feature branch management in jenkins

remove samples and templates

Skip SolutionCrawler.WorkCoordinatorTests.ProgressReporterTest until fixed

Document to describe how feature branches are managed in Jenkins. In particular
how to get the changes to netci.groovy to reflect in PRs made to the branch.

Offer to reset keybindings on ReSharper suspend/disable

* Forbid 'default' as a case constant or a pattern.

Fixes #23499

* Accept PE Operator Symbols having in parameters

* Address PR Comments

* dotnet/master: (39 commits)
  Prefer by-val methods over in methods in overload resolution (#23122)
  Update build to account for additional Mono.Cecil assemblies
  Fix build break
  Enable multicore JIT in the compilers (#23173)
  Separate debugging workspace service and EnC service (#23630)
  UseInferredMemberName: use one code style option and share more code (#23506)
  Add negative test cases
  Remove unnecessary Mono.Cecil reference
  Updated formatting of decompiler license notice
  Use sentence case for the decompiler legal notice
  Use ConcurrentDictionary to avoid locks in IsGeneratedCode and HasHiddenRegions
  Recognize condition with logical negation
  Refactor so that GetSymbolInfo can be called last
  Change the code fix to find the expression so that we don't need to unwrap the argument
  Add check for null argument syntax
  Fix argument names
  Formatting adjustments
  Add VB tests for omitted arguments
  Add WorkItem attributes
  Pool the Stopwatch instance used in the analyzer driver
  ...

* Prefer by-val methods over in methdos in overload resolution

* More tests

* Moved check to the end of OR chain

* Address PR comments

* Operators overloading

* Address PR Comments

* Clean up

Go To Disassembly

Fix UseNullPropagation codefix doesn't recognize `x is null ? null : x.y` pattern

issue when trying to get a property access modifier of a expression-b…

These were moved in https://github.com/dotnet/roslyn-sdk/pull/21

Pool the Stopwatch instance used in the analyzer driver

Lazily calculate values for GetBlockActionsByAnalyzer

Use ConcurrentDictionary to avoid locks in IsGeneratedCode and HasHiddenRegions

Rebuilt xlf files to fix build break

Here is the output from my perf testing tool currently in review that
shows a significant difference in csc.exe after the change:

```
// * Detailed results *
PlaceholderBenchmarkRunner.PlaceholderMethod: Job-TGYVCW(Toolchain=Perf.ExternalProcessToolchain, LaunchCount=0, RunStrategy=Monitoring, TargetCount=25, WarmupCount=0) [Commit=HEAD^]
Runtime = ; GC =
Mean = 4.8018 s, StdErr = 0.0215 s (0.45%); N = 25, StdDev = 0.1073 s
Min = 4.6717 s, Q1 = 4.7297 s, Median = 4.7892 s, Q3 = 4.8438 s, Max = 5.1998 s
IQR = 0.1141 s, LowerFence = 4.5585 s, UpperFence = 5.0149 s
ConfidenceInterval = [4.7214 s; 4.8822 s] (CI 99.9%), Margin = 0.0804 s (1.67% of Mean)
Skewness = 1.87, Kurtosis = 7.98

PlaceholderBenchmarkRunner.PlaceholderMethod: Job-TGYVCW(Toolchain=Perf.ExternalProcessToolchain, LaunchCount=0, RunStrategy=Monitoring, TargetCount=25, WarmupCount=0) [Commit=HEAD]
Runtime = ; GC =
Mean = 3.6409 s, StdErr = 0.0650 s (1.78%); N = 25, StdDev = 0.3249 s
Min = 3.4381 s, Q1 = 3.5510 s, Median = 3.5781 s, Q3 = 3.6189 s, Max = 5.1720 s
IQR = 0.0679 s, LowerFence = 3.4491 s, UpperFence = 3.7209 s
ConfidenceInterval = [3.3975 s; 3.8842 s] (CI 99.9%), Margin = 0.2433 s (6.68% of Mean)
Skewness = 4.16, Kurtosis = 19.76

Total time: 00:07:11 (431.13 sec)

// * Summary *

BenchmarkDotNet=v0.10.9, OS=Windows 10 Redstone 1 (10.0.14393)
Processor=Intel Xeon CPU E5645 2.40GHz, ProcessorCount=24
Frequency=2337892 Hz, Resolution=427.7358 ns, Timer=TSC
.NET Core SDK=2.1.1-preview-007094
  [Host] : .NET Core 2.0.0 (Framework 4.6.00001.0), 64bit RyuJIT

Toolchain=Perf.ExternalProcessToolchain  LaunchCount=0  RunStrategy=Monitoring
TargetCount=25  WarmupCount=0

            Method | Commit |    Mean |    Error |   StdDev | Rank |
------------------ |------- |--------:|---------:|---------:|-----:|
 PlaceholderMethod |   HEAD | 3.641 s | 0.2433 s | 0.3249 s |    1 |
 PlaceholderMethod |  HEAD^ | 4.802 s | 0.0804 s | 0.1073 s |    2 |

// * Legends *
  Commit : Value of the 'Commit' parameter
  Mean   : Arithmetic mean of all measurements
  Error  : Half of 99.9% confidence interval
  StdDev : Standard deviation of all measurements
  Rank   : Relative position of current benchmark mean among all benchmarks (Arabic style)
  1 s    : 1 Second (1 sec)

```

* dotnet/master: (61 commits)
  Suppress xlf on templates.csproj
  Fix the MSBuild syntax error
  added a way to set logging information synced to remote host and more logging for error list. (#23614)
  Revert "Merge pull request #23364 from tmat/DisableBackgroundCompiler"
  Reduce the number of attributes that should be bound in order to determine if there are NoPia local types explicitly defined in code. (#23505)
  Fix microbuild for VBCSCompiler
  Avoid using PerformanceSensitiveAttribute in pooled object types
  Testing theory about %TEMP%
  Move C# tests to testing metadata emitted attributes through `CompileAndVerify` (#22896)
  Fix xml doc files
  we called work done too early. (#23623)
  Test theory new props caused int failure
  Add VBCSCompiler.dll to the Microsoft.NETCore.Compilers package
  Further isolate our msbuild test files
  Deploy Dir.build.props / targets in tests
  Fix deployment of ilasm
  Fix publish dir name when no runtime identifier
  Generate xml doc files during build
  Fix publish to include runtime identifier in dir
  Remove unneeded file SettingsSdk.props
  ...

Move to minimal MSBuild syntax