Add pagination support to consistency group

Add pagination support to consistency group

In liberty release, we have added pagination to backups
and snapshots. There are still some work that hasn't been
done yet.
This patch adds pagination support to consistency groups.

APIImpact
Add pagination args like limit, marker, sort to query
consistency group.

DocImpact

Change-Id: I37602069e06cc99c9adbf45c2a981b0513a1be26
Implements: blueprint add-pagination-to-other-resource