Add kpod tag command

Add one or more tags to an image

Signed-off-by: Ryan Cole <rcyoalne@gmail.com>

cmd/kpod/common_test.go

@@ -0,0 +1,32 @@
+package main
+
+import (
+	"os/user"
+	"testing"
+
+	"flag"
+
+	"github.com/urfave/cli"
+)
+
+func TestGetStore(t *testing.T) {
+	u, err := user.Current()
+	if err != nil {
+		t.Log("Could not determine user.  Running as root may cause tests to fail")
+	} else if u.Uid != "0" {
+		t.Fatal("tests will fail unless run as root")
+	}
+
+	set := flag.NewFlagSet("test", 0)
+	globalSet := flag.NewFlagSet("test", 0)
+	globalSet.String("root", "", "path to the root directory in which data, including images,  is stored")
+	globalCtx := cli.NewContext(nil, globalSet, nil)
+	command := cli.Command{Name: "imagesCommand"}
+	c := cli.NewContext(nil, set, globalCtx)
+	c.Command = command
+
+	_, err = getStore(c)
+	if err != nil {
+		t.Error(err)
+	}
+}