To use an iSCSI Cinder backend as its store, glance_api must run
privileged and have /dev and /etc/iscsi properly mounted
Co-authored-by: Radosław Piliszek <radoslaw.piliszek@gmail.com>
Change-Id: I988d3c9d0564483440ae17203ad88a8049abbea4
Closes-Bug: #1855695