Container changes (#320)

Added container metrics

vendor/github.com/Microsoft/hcsshim/internal/ospath/join.go

@@ -0,0 +1,14 @@
+package ospath
+
+import (
+	"path"
+	"path/filepath"
+)
+
+// Join joins paths using the target OS's path separator.
+func Join(os string, elem ...string) string {
+	if os == "windows" {
+		return filepath.Join(elem...)
+	}
+	return path.Join(elem...)
+}