Acceptance Test Updates (#218)

* compute: don't pass choices

* blockstorage: don't pass choices

* DumpResource Function

This function prints a resource in JSON format but retains the actual
field name rather than using the name specified in the JSON tag.

* New DumpResource

This version just converts the resource into JSON. The original is
being left in git history for posterity.

* Renaming DumpResource to PrintResource

* Removing all print functions in favor of PrintResource

* Rebase reconcilliation
diff --git a/acceptance/openstack/identity/v3/service_test.go b/acceptance/openstack/identity/v3/service_test.go
index 364f69b..7a0c71f 100644
--- a/acceptance/openstack/identity/v3/service_test.go
+++ b/acceptance/openstack/identity/v3/service_test.go
@@ -6,6 +6,7 @@
 	"testing"
 
 	"github.com/gophercloud/gophercloud/acceptance/clients"
+	"github.com/gophercloud/gophercloud/acceptance/tools"
 	"github.com/gophercloud/gophercloud/openstack/identity/v3/services"
 )
 
@@ -26,7 +27,7 @@
 	}
 
 	for _, service := range allServices {
-		PrintService(t, &service)
+		tools.PrintResource(t, service)
 	}
 
 }