Merge pull request #510 from sstrato/patch-1

add floating IP options
diff --git a/openstack/networking/v2/extensions/layer3/floatingips/requests.go b/openstack/networking/v2/extensions/layer3/floatingips/requests.go
index 49d6f0b..29f752a 100644
--- a/openstack/networking/v2/extensions/layer3/floatingips/requests.go
+++ b/openstack/networking/v2/extensions/layer3/floatingips/requests.go
@@ -102,6 +102,7 @@
 	// Populate request body
 	reqBody := request{FloatingIP: floatingIP{
 		FloatingNetworkID: opts.FloatingNetworkID,
+		FloatingIP:        opts.FloatingIP,
 		PortID:            opts.PortID,
 		FixedIP:           opts.FixedIP,
 		TenantID:          opts.TenantID,