fix: flaky healthcheck test
fix: flaky healthcheck test

This commit adds a delay of 100ms to ensure that stats request is made
after the Redis calls are complete, otherwise it will result in a race
condition making the test fail.

scality/S3,truststamp/S3,truststamp/S3,truststamp/S3,tomateos/S3,tomateos/S3,lucisilv/Silviu_S3-Antidote,tomateos/S3,tomateos/S3,scality/S3,scality/S3,lucisilv/Silviu_S3-Antidote,scality/S3,lucisilv/Silviu_S3-Antidote,lucisilv/Silviu_S3-Antidote,tomateos/S3,truststamp/S3,lucisilv/Silviu_S3-Antidote,lucisilv/Silviu_S3-Antidote,scality/S3,truststamp/S3,truststamp/S3,tomateos/S3,truststamp/S3,truststamp/S3,scality/S3,scality/S3,tomateos/S3,tomateos/S3,lucisilv/Silviu_S3-Antidote,lucisilv/Silviu_S3-Antidote,scality/S3