Split large table into smaller query over netconf

[mnovak]

Related also to this question:

Is it possible for netconf to retrieve partial list from data-provider?

In our implementation, the max elements of list is 65535 and the server providing the data would take much time to update the stutus before send the data to data-provider. Is it possible for netconf to only retrieve partial list, e.g. 20K~30K?