This adds pagination support to the underlying client as well as
autopagination support on the CLI.
This adds --all and --marker to the associated
{cells,hosts,projects,regions}-list commands.
Depends-On: I11c5c6053e5f0873ee53df5b7dcb9b2ed25a0b64
Change-Id: Ic1f8f01e052ff7870f731d6c8a5d47d58d9dcfe9