Robot code syntax convention fixes

Changes:
   Fix keyword names which does not follow the case convention

Tested:
    NA
Change-Id: I77e82a905aff9883d3b4555ee3c9f8297c404313
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 bd59cf4..1febefa 100644
--- a/redfish/dmtf_tools/test_redfishtool_certificate.robot
+++ b/redfish/dmtf_tools/test_redfishtool_certificate.robot
@@ -291,7 +291,7 @@
     [Arguments]  ${delete_cert}=${True}
 
     ${cmd_output}=  Redfishtool Get  /redfish/v1/Managers/${MANAGER_ID}/Truststore/Certificates
-    ${cmd_output}=  Convert String to JSON  ${cmd_output}
+    ${cmd_output}=  Convert String To JSON  ${cmd_output}
     ${cert_list}=  Set Variable  ${cmd_output["Members"]}
     ${uri_length}=  Get Length  ${cert_list}
     ${file_status}=  Set Variable If
@@ -430,10 +430,10 @@
     # expected_error  Expected error optionally provided in testcase (e.g. 401 /
     #                 authentication error, etc. ).
 
-    ${rc}  ${cmd_output}=  Run and Return RC and Output  ${cmd_args} GET ${uri}
-    Run Keyword If  ${rc} != 0  Is HTTP error Expected  ${cmd_output}  ${expected_error}
+    ${rc}  ${cmd_output}=  Run And Return RC And Output  ${cmd_args} GET ${uri}
+    Run Keyword If  ${rc} != 0  Is HTTP Error Expected  ${cmd_output}  ${expected_error}
 
-    ${cmd_output}=  Convert String to JSON  ${cmd_output}
+    ${cmd_output}=  Convert String To JSON  ${cmd_output}
 
     RETURN  ${cmd_output["CertificateString"]}