dataCollectionSucceeded does event auto-clean

With the current default configuration it is not possible to identify when a datacollection failed and succeeded again, because the failed events will be deleted due to the auto-clean option.

<alarm-data reduction-key="%uei%:%dpname%:%nodeid%" alarm-type="2" clear-key="uei.opennms.org/nodes/dataCollectionFailed:%dpname%:%nodeid%" auto-clean="true"/>

The default configuration should be auto-clean="false".