Previously system.paxos TTL was set as max(3h, gc_grace_seconds). Introduce new per-table option named `paxos_grace_seconds` to set the amount of seconds which are used to TTL data in paxos tables when using LWT queries against the base table. Default value is equal to `DEFAULT_GC_GRACE_SECONDS`, which is 10 days. This change allows to easily test various issues related to paxos TTL. Fixes #6284 Tests: unit (dev, debug) Co-authored-by: Alejo Sanchez <alejo.sanchez@scylladb.com> Signed-off-by: Alejo Sanchez <alejo.sanchez@scylladb.com> Signed-off-by: Pavel Solodovnikov <pa.solodovnikov@scylladb.com> Message-Id: <20200816223935.919081-1-pa.solodovnikov@scylladb.com>