[FAB-4898] Fix incorrect package and UT failure

UT reports 0% coverage because the test codes use incorrect package in
orderer/metadata. Also, the test fails due to the use of unintentional
version. This CR fixes it.

Change-Id: Ica34ba5ea7b7c454f4bb39bc9a997886f802a965
Signed-off-by: Jun Nemoto <[email protected]>
Signed-off-by: Nao Nishijima <[email protected]>

Author: Jun Nemoto

orderer/metadata/metadata_test.go

@@ -11,16 +11,14 @@ import (
 	"runtime"
 	"testing"
 
-	"github.com/hyperledger/fabric/common/tools/cryptogen/metadata"
+	common "github.com/hyperledger/fabric/common/metadata"
+	"github.com/hyperledger/fabric/orderer/metadata"
 	"github.com/stretchr/testify/assert"
 )
 
 func TestGetVersionInfo(t *testing.T) {
-	testVersion := "TestVersion"
-	metadata.Version = testVersion
-
 	expected := fmt.Sprintf("%s:\n Version: %s\n Go version: %s\n OS/Arch: %s",
-		metadata.ProgramName, testVersion, runtime.Version(),
+		metadata.ProgramName, common.Version, runtime.Version(),
 		fmt.Sprintf("%s/%s", runtime.GOOS, runtime.GOARCH))
 	assert.Equal(t, expected, metadata.GetVersionInfo())
 }