Fix build by adding #nowarn pragmas

Replace Validation active pattern usage in ChoiceTests

Author: fdornak

src/FSharpx.Extras/CSharpCompat.fs

@@ -10,6 +10,8 @@ open FSharpx.Functional
 open FSharpx
 open Microsoft.FSharp.Control.WebExtensions
 
+#nowarn "FS0044"
+
 [<assembly:Extension>]
 do()
 

tests/FSharpx.Tests/ChoiceTests.fs

@@ -59,9 +59,9 @@ let ChoiceFolding() =
         actions |> Choice.foldM folder startingPosition
 
     match finalPosition with
-    | Validation.Success (x,y) ->
+    | Choice1Of2 (x,y) ->
         printfn "final position: %f,%f" x y
-    | Validation.Failure error ->
+    | Choice2Of2 error ->
         printfn "error: %s" error
         Assert.Fail("should not have failed: {0}", error)
 

tests/FSharpx.Tests/ValidationExample.fs

@@ -9,6 +9,7 @@ open FSharpx
 open FSharpx.Functional
 open FSharpx.Collections
 open FSharpx.Choice
+#nowarn "FS0044"
 open FSharpx.Validation
 
 // First let's define a domain.

tests/FSharpx.Tests/ValidationTests.fs

@@ -8,6 +8,7 @@ open FSharpx.CSharpTests
 open FSharpx
 open FSharpx.Functional
 open FSharpx.Choice
+#nowarn "FS0044"
 open FSharpx.Validation
 open FSharpx.Nullable
 open NUnit.Framework