Consolidate username and password in test

Changes:
    - Remove REST_USERNAME and REST_PASSWORD. Legacy username
      and password, default user OPENBMC_USERNAME and
      OPENBMC_PASSWORD.

Tested:
    - Boot test and sanity runs from sandbox

Change-Id: I86955d512530889c1a875b5efcc71f9df99432d9
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/tests/test_remote_logging.robot b/tests/test_remote_logging.robot
index 580442a..b6be429 100644
--- a/tests/test_remote_logging.robot
+++ b/tests/test_remote_logging.robot
@@ -225,7 +225,7 @@
     ${bmc_journald}  ${stderr}  ${rc}=  BMC Execute Command
     ...  journalctl -o json-pretty | cat
 
-    Should Not Contain Any  ${bmc_journald}  ${OPENBMC_PASSWORD}  ${REST_PASSWORD}  ${valid_password}
+    Should Not Contain Any  ${bmc_journald}  ${OPENBMC_PASSWORD}  ${valid_password}
     ...  ignore_case=False  msg=Journald logs BMC credentials/password ${OPENBMC_PASSWORD}.