At some point uplink cli lost ability to set metadata. This change
brings back this functionality for 'cp' operation.
https://github.com/storj/storj/issues/3848
Change-Id: Ia5f60eb577fcab8a38d94730d8cdc6e0338d3b46
When copying an object from cli you can now set the expiry.
It uses the same datetime format as restricting access grants.
Closes https://github.com/storj/storj/issues/4595
Change-Id: Icab73a64a9589817d6bc6d702b765b166ca1350d