Update ES test to use delete all error log method

Changes:
    - Use "Delete All Error Logs".

Change-Id: Ifd66e1deea11e6a09f21527e94b730ef1022fd91
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/tests/test_escale_base.robot b/tests/test_escale_base.robot
index 8fca023..3c5425f 100755
--- a/tests/test_escale_base.robot
+++ b/tests/test_escale_base.robot
@@ -117,7 +117,7 @@
     ...  Print Error Logs  ${error_logs}
     ...  AND  Fail  msg=Unexpected number of error logs.
 
-    Delete Error Logs
+    Delete All Error Logs
 
 
 Test Power Limit
@@ -150,7 +150,7 @@
     ${initial_power_setting}=  Get DCMI Power Limit
     Set Suite Variable  ${initial_power_setting}  children=true
 
-    Delete Error Logs
+    Delete All Error Logs
 
 
 Test Teardown Execution