Fixed cases with hard-coded 'chassis'

Reference to
https://www.dmtf.org/sites/default/files/standards/documents/DSP2046_2020.3.pdf

It should not hard-coded as 'chassis' in /redfish/v1/Chassis/chassis.
It could be different name for /redfish/v1/Chassis/{ChassisId}.

Signed-off-by: Tony Lee <tony.lee@quantatw.com>
Change-Id: Ie6e8f37356b88692148bdda7348e715fcac6b4e3
diff --git a/redfish/service_root/test_sessions_management.robot b/redfish/service_root/test_sessions_management.robot
index afe68f9..e7a81cc 100644
--- a/redfish/service_root/test_sessions_management.robot
+++ b/redfish/service_root/test_sessions_management.robot
@@ -132,7 +132,7 @@
 
     # Members can be one or more, hence checking in the list.
     Valid List  chassis['Members']
-    ...  required_values=[{'@odata.id': '/redfish/v1/Chassis/chassis'}]
+    ...  required_values=[{'@odata.id': '/redfish/v1/Chassis/${CHASSIS_ID}'}]
 
 
 Verify Systems Defaults