feature-2262: Make lvm drivers use incremental xpath
feature-2262: Remove HOST default attribute from lvm.conf
feature-2262: Remove HOST default attribute from ceph.conf and ceph drivers
feature-2262: Make iscsi drivers use incremental xpath structure
feature-2262: Remove HOST default attribute from iscsi.conf and iscsi drivers
feature #2262: fix default substitution
Merge branch 'feature-2262'