Add BMC state transition of reboot

This commit should support the transition to
reboot a BMC using systemd.  Later commits will
handle the remaining transition monitoring for
updating the current state.

Change-Id: I1fb14b8775de4d2cbc522aa3405c8917291bf3cc
Signed-off-by: Josh D. King <jdking@us.ibm.com>
2 files changed