Brute force copy_doc_type command

Because there is some trouble with replication on Cloudant, we've decided to brute force this little bit to move the receiverwrapper docs to a new database.

Note that due to CouchDB's version management, this is not idempotent. Every way I could think of to do so would slow it down immensely and it is also pretty silly.

No particular need to wait for tests, since this cannot affect them.