Add one configuration option CONF.libvirt.pmem_namespaces:
"$LABEL:$NSNAME[|$NSNAME][,$LABEL:$NSNAME[|$NSNAME]]"
e.g. "128G:ns0|ns1|ns2|ns3,262144MB:ns4|ns5,MEDIUM:ns6|ns7"
Change-Id: I98e5ddbd7a9f2211a16221b5049bc36452a49a75
Partially-Implements: blueprint virtual-persistent-memory
Co-Authored-By: He Jie Xu <hejie.xu@intel.com>