Nova does not provide public API to request multiple pauses at once. That feature have to be implemented following same pattern as the command nova delete in python novaclient.
(In reply to Pavel Raiskup from comment #5)
> That was meant to be RFE. No deadline required. Is this correct way to
> submit RFE's?
It is, but we have ~100 open RFEs for compute-related functionality and this is an extremely low priority request with valid alternative workflows to achieve the same result. I updated the status to accurately reflect that we do not expect to get to this.