Animesh, Can you please cherry-pick the following commit (https://git-wip-us.apache.org/repos/asf?p=cloudstack.git;a=commit;h=6d1475 182cd9ea17010a142043dd9fe9c923cf81) from 4.3-forward to 4.3 branch? Thanks.
6d1475182cd9ea17010a142043dd9fe9c923cf81 CLOUDSTACK-5960: Domain admin or user cannot register a template using S3/Swift object store.