Animesh, Can you cherry pick the following commits from 4.3-forward to 4.3?
4c83f80c809674cb8ff9561d546a6ade25d983f8 CLOUDSTACK-6174: Provide separate option for Windows Server 2012 R2 as an OS type when registering template. 94257c0fc85c7178e6ca3146662de08feee2c290 CLOUDSTACK-6175:s3.singleupload.max.size option not applicable for backup snapshot on KVM. Thanks -min