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/certificate_utils.robot b/lib/certificate_utils.robot
index 961178c..60dcb27 100755
--- a/lib/certificate_utils.robot
+++ b/lib/certificate_utils.robot
@@ -164,7 +164,7 @@
 
 Delete All CA Certificate Via Redfish
     [Documentation]  Delete all CA certificate via Redfish.
-    ${cert_list}=  Redfish_Utils.Get Member List  /redfish/v1/Managers/bmc/Truststore/Certificates
+    ${cert_list}=  Redfish_Utils.Get Member List  /redfish/v1/Managers/${MANAGER_ID}/Truststore/Certificates
     FOR  ${cert}  IN  @{cert_list}
       Redfish.Delete  ${cert}  valid_status_codes=[${HTTP_NO_CONTENT}]
       Log To Console  Wait Time started in seconds ${wait_time}
@@ -318,5 +318,5 @@
 
     # NTP network takes few seconds to restart.
     Wait Until Keyword Succeeds  30 sec  10 sec
-    ...  Redfish.Patch  ${REDFISH_BASE_URI}Managers/bmc  body={'DateTime': '${new_time}'}
+    ...  Redfish.Patch  ${REDFISH_BASE_URI}Managers/${MANAGER_ID}  body={'DateTime': '${new_time}'}
     ...  valid_status_codes=[${HTTP_OK}]