S3 connector and empty bucket issue

show schemas will not list the information about a registered s3 plugin if the bucket is empty. This is in embedded mode.

Steps to reproduce:

• Go to http://localhost:8047/storage
• Add s3 plugin (make sure bucket empty)
• show schemas will not information about the s3 plugin/workspaces
• Add a test file to bucket and show schemas will show the plugin/workspace