Skipping racy tests (#1375)

internal/context_test.go

@@ -74,6 +74,7 @@ func TestContextChildParentCancelRace(t *testing.T) {
 }
 
 func TestContextConcurrentCancelRace(t *testing.T) {
+	t.Skip("This test is racy and not reliable. It is disabled until we can make it reliable.")
 	/*
 		A race condition existed due to concurrently ending goroutines on shutdown (i.e. closing their chan without waiting
 		on them to finish shutdown), which executed... quite a lot of non-concurrency-safe code in a concurrent way.  All
@@ -104,6 +105,7 @@ func TestContextConcurrentCancelRace(t *testing.T) {
 }
 
 func TestContextAddChildCancelParentRace(t *testing.T) {
+	t.Skip("This test is racy and not reliable. It is disabled until we can make it reliable.")
 	/*
 		It's apparently also possible to race on adding children while propagating the cancel to children.
 	*/