Replaced chassis with ${CHASSIS_ID}
Replaced chassis with ${CHASSIS_ID}

 - The chassis should be the variable ${CHASSIS_ID} like is
in others robot tests files.

Signed-off-by: Jorge Cisneros <c4757734f70f459b8d7d94f057f93151b0c47daa@lenovo.com>
Change-Id: Iaa1d70808ea8c508df1cdcf6c46b8d28b6c44e15

openbmc/openbmc-test-automation,openbmc/openbmc-test-automation