rest-on-couch-import and no connection to couch

[lpatiny]

If for some reason couchdb is not available, rest-on-couch-import process will give an error and the file to import will move to errored.

This is quite annoying because when we start docker-compose and there is a new 'view' to create in couchdb it can take a while and all the files to import will move to errored.

I think that if it is a connection problem or saving problem the files should stay in the to_import folder.

The logging system will also fail because there is no connection to couchdb.