Initial commit for TTL
Simplify SAFETy_TTLs
Rework interfaces, separate config based TTL provider and safety TTL provider
Split out TTL specific configs to own class
Unify TTL interface, add tests
Add tests for String TTLs
Remove DefaultTenantTtlProvider
Cleanup
Use Guava Table for TtlMapper, remove fallback for ConfigTtlProvider
Remove TtlMapper altogether; switch to using ImmutableTable for Ttl map
Fix broken test
Merge pull request #230 from lakshmi-kannan/bf_ttl_support

RFR: Add Config based TTL support for BF.