Update cell usable memory alert for ADR021  - Increase time period to 2 hours
Update cell usable memory alert for ADR021
 - Increase time period to 2 hours

 - Use Exponential Weighted Moving Average over a window of 5

alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf