Ceph » rgw

A recent PR (#29179) made sure that a bucket listing could not request too many entries at once. It also did a minimum computation for number of entries. For ordered listing the minimum was 0, as required to pass all unit tests. However the minimum for unordered listing was left at 1. In order to make ordered and unordered listing behave the same -- with the exception of ordering -- the minimum for unordered listing is modified to 0.