Modified  some methods a bit and added a couple of tests
Added snapshot files into settings.yaml

Change-Id: Id1a53503483c85e4effbed3ada180c787f686eb1
[PRD-2397] Allow volumes to use entire disks if available

Change-Id: I3eb837360c07c88557c48cfa473360f21e952992
Implemented handler for node network assignment

Change-Id: I0c56fcd643d989df8d1efe162327759569d73514