In order to make more efficient use of disk space, let's change the
default retention policy. Being able to react to changes with a
10-seccond precision less likely to be usefule as the data gets older,
and our historic data does not give much insight beyond a 1-hour
precision.
This change does not effect already created metrics, changing that would
require a manual run of whisper-resize.py on the data directories. This
only effects new metrics.
Old retention:
10-second precision for 6 hours
60-second precision for 7 days
10-minute precision for 5 years
New retention
10-second precision for 8 hours
60-second precision for 7 days
1-hour precision for 1 year
1-day precision for 5 years
Change-Id: I08d73d092fc73c271e9092f551f38f395e006ca4
730b938ec3