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/redfish/dmtf_tools/test_redfishtool_certificate.robot b/redfish/dmtf_tools/test_redfishtool_certificate.robot
index 327d1f8..9c3a68b 100644
--- a/redfish/dmtf_tools/test_redfishtool_certificate.robot
+++ b/redfish/dmtf_tools/test_redfishtool_certificate.robot
@@ -137,7 +137,7 @@
     ${file_data}=  Decode Bytes To String  ${bytes}  UTF-8
 
     ${certificate_dict}=  Create Dictionary
-    ...  @odata.id=/redfish/v1/Managers/bmc/NetworkProtocol/HTTPS/Certificates/1
+    ...  @odata.id=/redfish/v1/Managers/${MANAGER_ID}/NetworkProtocol/HTTPS/Certificates/1
 
     ${dict_objects}=  Create Dictionary  CertificateString=${file_data}
     ...  CertificateType=PEM  CertificateUri=${certificate_dict}
@@ -284,7 +284,7 @@
 Delete All CA Certificate Via Redfisthtool
     [Documentation]  Delete all CA certificate via Redfish.
 
-    ${cmd_output}=  Redfishtool Get  /redfish/v1/Managers/bmc/Truststore/Certificates
+    ${cmd_output}=  Redfishtool Get  /redfish/v1/Managers/${MANAGER_ID}/Truststore/Certificates
     ${cmd_output}=  Convert String to JSON  ${cmd_output}
     ${cert_list}=  Set Variable  ${cmd_output["Members"]}
     FOR  ${cert}  IN  @{cert_list}