Managers ID : Introduced variable to declare Managers ID in resource.robot and updated all the scripts in openbmc-test-automation

Changes:
    - Introduced ${MANAGER_ID} variable in resource.robot
    - Replaced all the Managers/bmc to Managers/${MANAGER_ID} across all the scripts
    - Also in data/variables.py updated chassis id for the few redfish uri.

Tested:
     - Ran All The Scripts Successfully

Change-Id: Iff3673aae27657e0799dec5cb94c1651a0cd5d18
Signed-off-by: ganesanb <ganesanb@ami.com>
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/lib/bmc_redfish_utils.robot b/lib/bmc_redfish_utils.robot
index c95f7f5..3bc107c 100644
--- a/lib/bmc_redfish_utils.robot
+++ b/lib/bmc_redfish_utils.robot
@@ -48,10 +48,10 @@
     #    "GracefulRestart",
     #    "ForceRestart"
     #  ],
-    #  "target": "/redfish/v1/Managers/bmc/Actions/Manager.Reset"
+    #  "target": "/redfish/v1/Managers/${MANAGER_ID}/Actions/Manager.Reset"
     # }
 
-    ${target}=  redfish_utils.Get Target Actions  /redfish/v1/Managers/bmc/  Manager.Reset
+    ${target}=  redfish_utils.Get Target Actions  /redfish/v1/Managers/${MANAGER_ID}/  Manager.Reset
     ${payload}=  Create Dictionary  ResetType=${reset_type}
     Redfish.Post  ${target}  body=&{payload}
 
@@ -359,6 +359,6 @@
 Get BMC Last Reset Time
     [Documentation]  Return BMC LastResetTime.
 
-    ${last_reset_time}=  Redfish.Get Attribute  /redfish/v1/Managers/bmc  LastResetTime
+    ${last_reset_time}=  Redfish.Get Attribute  /redfish/v1/Managers/${MANAGER_ID}  LastResetTime
 
     [Return]  ${last_reset_time}