Description of problem:
Disabling some image features of an image in 'pool mirroring' enabled pool in primary cluster is not getting reflected in corresponding image of corresponding pool in secondary cluster.

Version-Release number of selected component (if applicable):
ceph version 10.2.7-13.el7cp 

How reproducible:
Always

Steps to Reproduce:
1. Follow section 4.5 in Block Device guide to Configure pool mirroring.
2. Create a image and enable journaling feature and make sure that it has got mirrored to secondary cluster.
3. For above image in primary cluster disable image features like fast-diff, object-map and deep-flatten 

Actual results:
Image in secondary doesn't reflect corresponding image in primary cluster properly

Expected results:
Image in secondary must reflect corresponding image in primary cluster properly

Additional info:
Couldn't observe any issue with data synchronization.