CLEANUP: Log metadata wrapper errors as warnings
CLEANUP: Log metadata wrapper errors as warnings

This avoids unnecessary noise in logs and actual errors are logged on
the api level.

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