obmcutil: Add wait/timeout option

The option to block/wait for a state transition to complete has
been added. The transition is expected to occur within a set
timeout window and will terminate if the desired state has not
been observed within that window. It may be possible for the
state transition to complete outside this window, but it is
assumed to be a failure.

Change-Id: Icb9ff29f51b8712469fd9957b7e4b287704cb314
Signed-off-by: Anthony Wilson <wilsonan@us.ibm.com>
1 file changed