Namespace buckets (Blob) - 'Invalid ListBlobs marker' error when listing objects with wrong key marker

[romayalon]

Environment info

• NooBaa master**
• Platform: ** minikube 1.1.1**

Actual behavior

1. Created namespace resource on Azure (first hierarchy is folders only and having objects in those folders)
2. Created namespace resource on AWS (first hierarchy is folders only and having objects in those folders)
3. Created namespace bucket on top of the namespace resources from sections 1+2
4. Called listObjects with the marker 'AAAAAAAA' - got the following error as response from namespaceBlob: 'Invalid ListBlobs marker.' (it occurred also when instead of 'AAAAAAA', namespace blob lists with a key marker from the AWS bucket)

Expected behavior

1. successful list with marker.

Steps to reproduce

More information - Screenshots / Logs / Other output