[wsdm][metrics] Metrics Subgroup call

["Nikula, Richard" <Richard_Nikula@bmc.com>]

We will hold our next subgroup call on Monday October 4th at 8am PDT,
10am CDT, 11am EDT  

We will use the WSDM call-in number 
Toll Free: 1-877-811-9717, Passcode: 440496, International: 712-237-2657

Clarify metric attribute (type, timescope, etc). 
Discuss change event topics (for metrics) (Bryan)