If we're in observe-only mode then we cannot run commands that would
affect the server's state, including getSetVariable, so prevent that
from being called in observe-only mode.
(Bitbake rev: 2c5a8661430edebff67ab4a108995033d182b5d6)
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>