Fixes #20: add an extra file for CouchDB to put uuid into

CouchDB will put the `uuid` into the 'last file in the configuration
chain' (see: https://issues.apache.org/jira/browse/COUCHDB-2064). Added
a file that will be last lexicographically (with name in upper case), so
the file managed by Chef won't be touched on every restart.
The problem is that CouchDB writes any local config changes to the last file in config chain. In your setup all the changes will land into local.d/UUID.ini file instead of local.ini where you might be expected to look for them.