Fix several issues with `go vet` and `go fmt`

For some reason, `go vet` and `go fmt` validate does not capture
several issues.

The following was the output of `go vet`:
```
ubuntu@ubuntu:~/docker$ go vet ./... 2>&1 | grep -v ^vendor | grep -v '^exit status 1$'
cli/command/formatter/container_test.go:393: possible formatting directive in Log call
volume/volume_test.go:257: arg mp.RW for printf verb %s of wrong type: bool
```

The following was the output of `go fmt -s`:
```
ubuntu@ubuntu:~/docker$ gofmt -s -l . | grep -v ^vendor
cli/command/stack/list.go
daemon/commit.go
```

Fixed above issues with `go vet` and `go fmt -s`

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

command/formatter/container_test.go

@@ -372,7 +372,7 @@ func TestContainerContextWriteJSONField(t *testing.T) {
 }
 
 func TestContainerBackCompat(t *testing.T) {
-	containers := []types.Container{types.Container{ID: "brewhaha"}}
+	containers := []types.Container{{ID: "brewhaha"}}
 	cases := []string{
 		"ID",
 		"Names",
@@ -390,7 +390,7 @@ func TestContainerBackCompat(t *testing.T) {
 	for _, c := range cases {
 		ctx := Context{Format: Format(fmt.Sprintf("{{ .%s }}", c)), Output: buf}
 		if err := ContainerWrite(ctx, containers); err != nil {
-			t.Log("could not render template for field '%s': %v", c, err)
+			t.Logf("could not render template for field '%s': %v", c, err)
 			t.Fail()
 		}
 		buf.Reset()

command/stack/list.go

@@ -72,7 +72,7 @@ func printTable(out io.Writer, stacks []*stack) {
 
 type stack struct {
 	// Name is the name of the stack
-	Name     string
+	Name string
 	// Services is the number of the services
 	Services int
 }