Create parent diskpool
Create parent diskpool

DSP1041 states that all pool allocations will occur from a parent, primordial
pool.  This patch adds the parent pool for disk pools.

Signed-off-by: Kaitlin Rupert <5d963ff58691ce861c80ea2b0deed9b0b88171bc@us.ibm.com>

libvirt/libvirt-cim,libvirt/libvirt-cim,libvirt/libvirt-cim