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>

image_test.go

@@ -35,7 +35,7 @@ func TestImageIsUnpacked(t *testing.T) {
 	}
 
 	const imageName = "docker.io/library/busybox:latest"
-	ctx, cancel := testContext()
+	ctx, cancel := testContext(t)
 	defer cancel()
 
 	client, err := newClient(t, address)
@@ -86,7 +86,7 @@ func TestImagePullWithDistSourceLabel(t *testing.T) {
 		tag      = "latest"
 	)
 
-	ctx, cancel := testContext()
+	ctx, cancel := testContext(t)
 	defer cancel()
 
 	client, err := newClient(t, address)