ironic-python-agent/ironic_python_agent at 5aa0c1a2bb1050fb033cf307139e3ed0fbcb5cda - ironic-python-agent - OpenDev: Free Software Needs Free Tools

This is largely required for the future lockdown command but can also be
used before the normal shutdown, especially in the sync command which is
currently used before an out-of-band shutdown command is issued.
In addition to a plain sync, the new command also tells the kernel to
drop its cached and issues a low-level sync command to each block
device.
Partial-Bug: #2077432
Change-Id: I3fc87b20bc5387a466b24ebc19b9982e4e368d20