BF: Log errors or return errors from MD
BF: Log errors or return errors from MD

Fix #252
* If a method is not logging an error from metadata, then log it
* If an error object is not being handled, then log it and return
  the callback, passing the error object

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