Updated openstack/openstack
Project: openstack/ceilometer  447573f8c99359bc524d4adeaf07aa0179a2d19f
null
Exclude weak datapoints from alarm threshold evaluation

Addresses: BP exclude-low-sample-count

To avoid alarm threshold evaluation being inappropriately skewed by
aggregates with anomalously low sample count, these weak data may be
excluded for selected alarms by setting a new 'exclude_outliers'
field on the alarm threshold rule.

An outlier in this context is considered to be an aggregate with
sample count that differs from the observed mean by more than two
standard deviations.

Change-Id: I45d05db57662588df5796a8d6864ed01d1e4165f