Create ActivationBlocksTransition before write HOST BIOS image

Currently, Host can be turned on and the BMC can reboot during HOST BIOS
image is flashing. it can make the flashing fails.
Enable ActivationBlocksTransition before write HOST BIOS image to block
turning on HOST or reboot BMC when flashing did not complete.

Tested:
      1. Request to write new Host bios image via Redfish.
      2. Turn on HOST.
      3. HOST still is off until flashing completed.
      4. New HOST BIOS image is flashed.

Signed-off-by: Thang Tran <thuutran@amperecomputing.com>
Change-Id: Ifa8ec1a96bc9c1ecf0dbdcc5d11435c0f594d66b
1 file changed