Adding delete group
diff --git a/openstack/compute/v2/extensions/secgroups/requests_test.go b/openstack/compute/v2/extensions/secgroups/requests_test.go
index 0bc843c..1dc43d3 100644
--- a/openstack/compute/v2/extensions/secgroups/requests_test.go
+++ b/openstack/compute/v2/extensions/secgroups/requests_test.go
@@ -136,3 +136,13 @@
 
 	th.AssertDeepEquals(t, expected, group)
 }
+
+func TestDelete(t *testing.T) {
+	th.SetupHTTP()
+	defer th.TeardownHTTP()
+
+	mockDeleteGroupResponse(t, groupID)
+
+	err := Delete(client.ServiceClient(), groupID).ExtractErr()
+	th.AssertNoErr(t, err)
+}