Log Message:
Update databases/redis to 4.0.7.

- Many 32 bit overflows were addressed in order to allow to use Redis with
  a very significant amount of data, memory size permitting.
- MEMORY USAGE fixed for the list type.
- Allow read-only scripts in Redis Cluster.
- Fix AOF pipes setup in edge case.
- AUTH option for MIGRATE.
- HyperLogLogs are no longer converted from sparse to dense in order
  to be merged.
- Fix AOF rewrite dead loop under edge cases.
- Fix processing of large bulk strings (>= 2GB).
- Added RM_UnlinkKey in modules API.
- Fix Redis Cluster crashes when certain commands with a variable number
  of arguments are called in an improper way.
- Fix memory leak in lazyfree engine.
- Fix many potentially successful partial synchronizations that end
  doing a full SYNC, because of a bug destroying the replication
  backlog on the slave. So after a failover the slave was often not able
  to PSYNC with masters, and a full SYNC was triggered. The bug only
  happened after 1 hour of uptime so escaped the unit tests.
- Improve anti-affinity in master/slave allocation for Redis Cluster
  when the cluster is created.
- Improve output buffer handling for slaves, by not limiting the amount
  of writes a slave could receive.