Updated openstack/openstack
Project: openstack/heat  b3a16b78b2e89a470fb080e2798f0fb773e6674e

Don't pass empty action strings to ceilometer

Note: this only really happens when using the cloud watch
resource template.

Partial-bug: #1373247
Change-Id: I084d28dfbbd0f2d7a6a18a09600f86880fa394d5