MB-7629 Use other key values for view unit tests

The new values were produced by CouchDB (Erlang), therefore
it's better to check that we can decode these values and
encode them back to the exact same byte sequence that CouchDB
produced.

Change-Id: Id38793f574233d8d3c578999db3502f824f29432
Reviewed-on: http://review.couchbase.org/25490
Reviewed-by: Volker Mische <volker.mische@gmail.com>
Reviewed-by: Fulu Li <fulu@couchbase.com>
Tested-by: Fulu Li <fulu@couchbase.com>
Tested-by: Filipe David Borba Manana <fdmanana@gmail.com>