This identifies the collection type for this row entry. Each
collection will have the 'summary' data. If the
etsysIpSlaConfigDistributionCount is not zero, the collection
will have a 'distribution' set of data. If the
etsysIpSlaConfigHistoryCollections is not zero, the collection
will have a 'history' set of data.
summary(1) - The row entry data corresponds to the
cumulative statistics gathered during a test.
distribution(2) - The row entry data corresponds to the
statistical distribution of the round-trip-
time data.
history(3) - The row entry data corresponds to a storage
history collection of data.