Fix TTL bug lastRegistredAt element was only set at creation of a time series. Now it is updated every time a new event is seen for that time series.
Fix TTL bug
lastRegistredAt element was only set at creation of a time series.
Now it is updated every time a new event is seen for that time series.

Signed-off-by: Cedric Den Haese <e7b21a007f80999cf81f665a0d964c6453876fef@gmail.com>

prometheus/statsd_bridge,prometheus/statsd_exporter