Add an option to disable cloud watch lite

[OpenStack Infra]

https://review.openstack.org/123039

Dear documentation bug triager. This bug was created here because we did not know how to map the project name "openstack/heat" to a launchpad project name. This indicates that the notify_impact config needs tweaks. You can ask the OpenStack infra team (#openstack-infra on freenode) for help if you need to.

commit 33eb87b3e2d8da3ba11901c4762c19b0fc740dab
Author: Angus Salkeld <email address hidden>
Date: Thu Sep 25 08:26:36 2014 +1000

    Add an option to disable cloud watch lite

    This also adds a deprecation warning.
    This also changes the default to use Ceilometer.

    Release message:
    Anyone deploying Heat should not be using OS::Heat::CWLiteAlarm, but
    OS::Ceilometer::Alarm.
    CWLiteAlarm should be explictly disabled in /etc/heat/heat.conf by
    setting "enable_cloud_watch_lite=false". This will stop Heat from
    running a period task check for alarms.

    DocImpact
    Change-Id: I2a10c14772bdafc001e211d7e94502ac1f6b32b1
    Closes-bug: #1322128

[Darren Chan (dazzachan)]

This change has been updated in the Heat Orchestration Template Guide: https://github.com/openstack/openstack-manuals/commit/d816b1f93416670310f07f0df95bde98c60a3a46