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/blockstorage/v2/volumes_test.go b/acceptance/openstack/blockstorage/v2/volumes_test.go
index 3508bc5..9003ca7 100644
--- a/acceptance/openstack/blockstorage/v2/volumes_test.go
+++ b/acceptance/openstack/blockstorage/v2/volumes_test.go
@@ -6,6 +6,7 @@
 	"testing"
 
 	"github.com/gophercloud/gophercloud/acceptance/clients"
+	"github.com/gophercloud/gophercloud/acceptance/tools"
 	"github.com/gophercloud/gophercloud/openstack/blockstorage/v2/volumes"
 )
 
@@ -26,7 +27,7 @@
 	}
 
 	for _, volume := range allVolumes {
-		PrintVolume(t, &volume)
+		tools.PrintResource(t, volume)
 	}
 }
 
@@ -47,5 +48,5 @@
 		t.Errorf("Unable to retrieve volume: %v", err)
 	}
 
-	PrintVolume(t, newVolume)
+	tools.PrintResource(t, newVolume)
 }