Allow boot_utils users to pass stack_mode/quiet.

Where at one time users had to do this:

    Set Global Variable  ${stack_mode}  skip
    Set Global Variable  ${quiet}  ${1}
    REST Power On

They may now do this:

    REST Power On  stack_mode=skip  quiet=1

Change-Id: I53d34a591a529d890e85b3f7b23a322d2f26e7e2
Signed-off-by: Michael Walsh <micwalsh@us.ibm.com>
3 files changed