Adding isRootEnabled feature
diff --git a/openstack/db/v1/instances/requests_test.go b/openstack/db/v1/instances/requests_test.go
index 0845e0c..0dfcdc6 100644
--- a/openstack/db/v1/instances/requests_test.go
+++ b/openstack/db/v1/instances/requests_test.go
@@ -143,3 +143,15 @@
 	th.AssertNoErr(t, err)
 	th.AssertDeepEquals(t, expected, user)
 }
+
+func TestIsRootEnabled(t *testing.T) {
+	th.SetupHTTP()
+	defer th.TeardownHTTP()
+
+	HandleIsRootEnabledSuccessfully(t, instanceID)
+
+	isEnabled, err := IsRootEnabled(fake.ServiceClient(), instanceID)
+
+	th.AssertNoErr(t, err)
+	th.AssertEquals(t, true, isEnabled)
+}