Fix behaviour of Explicit test fixtures (#244)

Consumer/TestExplicit.fs

@@ -0,0 +1,24 @@
+namespace Consumer
+
+open NUnit.Framework
+
+[<TestFixture>]
+module TestExplicitIndividual =
+
+    [<Explicit>]
+    [<Test>]
+    let ``This test should not be run`` () = failwith<unit> "should not call"
+
+[<Explicit>]
+[<TestFixture>]
+module TestExplicitModule =
+
+    [<OneTimeSetUp>]
+    let setUp () = failwith<unit> "should not call: setup"
+
+    [<OneTimeTearDown>]
+    let tearDown () =
+        failwith<unit> "should not call: teardown"
+
+    [<Test>]
+    let ``This test should not be run because its module is explicit`` () = failwith<unit> "should not call: test"