Run gofmt on repository/repo.go.

Change-Id: Id0d4928999f41ade50a94aecd5bd115478d5cce9
Reviewed-on: http://review.couchbase.org/42498
Tested-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>
Reviewed-by: John Liang <johliang00@gmail.com>
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>