Adding delegate for Get instance + tests
diff --git a/rackspace/db/v1/instances/delegate.go b/rackspace/db/v1/instances/delegate.go
index c8551df..16f1bb1 100644
--- a/rackspace/db/v1/instances/delegate.go
+++ b/rackspace/db/v1/instances/delegate.go
@@ -3,6 +3,7 @@
 import (
 	"github.com/rackspace/gophercloud"
 	os "github.com/rackspace/gophercloud/openstack/db/v1/instances"
+	"github.com/rackspace/gophercloud/pagination"
 )
 
 // DatastoreOpts represents the configuration for how an instance stores data.
@@ -95,3 +96,11 @@
 func Create(client *gophercloud.ServiceClient, opts os.CreateOptsBuilder) CreateResult {
 	return CreateResult{os.Create(client, opts)}
 }
+
+func List(client *gophercloud.ServiceClient) pagination.Pager {
+	return os.List(client)
+}
+
+func Get(client *gophercloud.ServiceClient, id string) GetResult {
+	return GetResult{os.Get(client, id)}
+}