Muhammad Muaaz Saleem b1745c5eed Making TTL configurable, at least globally
Making metrics expiration TTL configurable globally configurable.
This is so RemoveExpired can be tested. Not making the TTL configurable
per metric yet because it could change behaviour in production.

Signed-off-by: Muhammad Muaaz Saleem <muhammad.muaaz.saleem@zalando.de>
2018-11-20 10:34:44 +01:00
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