Add testing log context

Enables showing debug logs in testing output.
For integration tests the client log output will show
in addition to daemon output, with timestamps for better
correlation.

Signed-off-by: Derek McGowan <derek@mcgstyle.net>

snapshots/testsuite/testsuite.go

@@ -27,6 +27,7 @@ import (
 	"time"
 
 	"github.com/containerd/containerd/errdefs"
+	"github.com/containerd/containerd/log/logtest"
 	"github.com/containerd/containerd/mount"
 	"github.com/containerd/containerd/namespaces"
 	"github.com/containerd/containerd/pkg/testutil"
@@ -71,7 +72,7 @@ func makeTest(name string, snapshotterFn func(ctx context.Context, root string)
 	return func(t *testing.T) {
 		t.Parallel()
 
-		ctx := context.Background()
+		ctx := logtest.WithT(context.Background(), t)
 		ctx = namespaces.WithNamespace(ctx, "testsuite")
 		// Make two directories: a snapshotter root and a play area for the tests:
 		//