Updated openstack/openstack
Project: openstack/ceilometer  9a6fd6b524a17c83fdb33b740091f8948e9d24c7
null
doc: fix formatting of alarm action types

Trivial fix to make this list be formatted correctly, highlight the
terms being described and s/http call back/HTTP callback/.

Change-Id: I00710fc7f7f389d13c3ce4c6a715de663e2c05b4