run NBench test despite previous failed

[alex-bogomaz]

Hello, please review this PR
it fixes #3268 - now build process runs all NBench test assemblies, even if some of them are failed.

In case of error it produces following sample output -
here we have 2 fails:

• one when runner exited with -1
• another when runner timed-out:

Running build failed.
Error:
System.Exception: NBench.Runner failed for 2 run(s):
1: "System.Exception: D:\GitHub\alex-bogomaz\akka.net\tools\NBench.Runner\lib\net45\NBench.Runner.exe "D:\GitHub\alex-bogomaz\akka.net
\src\core\Akka.Cluster.Tests.Performance\bin\Release\net452\Akka.Cluster.Tests.Performance.dll" "output-directory="D:\GitHub\alex-bogo
maz\akka.net\PerfResults"" "concurrent="true"" "trace="true"" "teamcity="false""
exited with code -1
   at Microsoft.FSharp.Core.PrintfModule.PrintFormatToStringThenFail@1379.Invoke(String message)
   at FSI_0005.Build.failedRuns@289-6.Invoke(String asm)"

2: "System.Exception: Process D:\GitHub\alex-bogomaz\akka.net\tools\NBench.Runner\lib\net45\NBench.Runner.exe "D:\GitHub\alex-bogomaz\
akka.net\src\core\Akka.Remote.Tests.Performance\bin\Release\net452\Akka.Remote.Tests.Performance.dll" "output-directory="D:\GitHub\ale
x-bogomaz\akka.net\PerfResults"" "concurrent="true"" "trace="true"" "teamcity="false""  timed out.
   at Fake.ProcessHelper.ExecProcessWithLambdas@116-22.Invoke(String message) in D:\code\fake\src\app\FakeLib\ProcessHelper.fs:line 11
6
   at Fake.ProcessHelper.ExecProcessWithLambdas(FSharpFunc`2 configProcessStartInfoF, TimeSpan timeOut, Boolean silent, FSharpFunc`2 e
rrorF, FSharpFunc`2 messageF) in D:\code\fake\src\app\FakeLib\ProcessHelper.fs:line 116
   at FSI_0005.Build.runNBench@262.Invoke(String assembly)
   at FSI_0005.Build.failedRuns@289-6.Invoke(String asm)"


   at Microsoft.FSharp.Core.PrintfModule.PrintFormatToStringThenFail@1379.Invoke(String message)
   at Fake.TargetHelper.runSingleTarget(TargetTemplate`1 target) in D:\code\fake\src\app\FakeLib\TargetHelper.fs:line 626

[Aaronontheweb]

@alex-bogomaz dude, you are the man. Thank you! One less build script thing I have to fix myself. I appreciate this very much.