This test was failing from time to time see discussion at the bottom of #7635
This was probably due to timing, the DEBUG SLEEP executed by redis-cli
didn't sleep for enough time.
This commit changes:
1) use SET-ACTIVE-EXPIRE instead of DEBUG SLEEP
2) reduce many `after` sleeps with retry loops to speed up the test.
3) add many comment explaining the different steps of the test and
it's purpose.
4) config appendonly before populating the volatile keys, so that they'll
be part of the AOF command stream rather than the preamble RDB portion.
other complications: recently kill_instance switched from SIGKILL to
SIGTERM, and this would sometimes fail since there was an AOFRW running
in the background. now we wait for it to end before attempting the kill.
(cherry picked from commit b491d477c3062d1fb064a794d74643c82d1c4adc)
Fix consistency test added in af5167b7f without considering TLS
redis-cli configuration.
(cherry picked from commit bedf1b21269dfb8afb584bc24585023af8b2a208)
