Support bucket versioning (#9377)

- Implement a new xl.json 2.0.0 format to support,
  this moves the entire marshaling logic to POSIX
  layer, top layer always consumes a common FileInfo
  construct which simplifies the metadata reads.
- Implement list object versions
- Migrate to siphash from crchash for new deployments
  for object placements.

Fixes #2111

cmd/object-api-getobjectinfo_test.go

@@ -22,7 +22,7 @@ import (
 	"testing"
 )
 
-// Wrapper for calling GetObjectInfo tests for both XL multiple disks and single node setup.
+// Wrapper for calling GetObjectInfo tests for both Erasure multiple disks and single node setup.
 func TestGetObjectInfo(t *testing.T) {
 	ExecObjectLayerTest(t, testGetObjectInfo)
 }
@@ -30,7 +30,7 @@ func TestGetObjectInfo(t *testing.T) {
 // Testing GetObjectInfo().
 func testGetObjectInfo(obj ObjectLayer, instanceType string, t TestErrHandler) {
 	// This bucket is used for testing getObjectInfo operations.
-	err := obj.MakeBucketWithLocation(context.Background(), "test-getobjectinfo", "", false)
+	err := obj.MakeBucketWithLocation(context.Background(), "test-getobjectinfo", BucketOptions{})
 	if err != nil {
 		t.Fatalf("%s : %s", instanceType, err.Error())
 	}