Update delete error logs to use "Delete All Error Logs"

We are planning to delete 'Delete Error Logs' and replace with
the "Delete All Error Logs" as its the correct way to purge
existing error logs on the system.

Change-Id: I7d186c46e169ee5a8ba17a3d6c69be0949e845e6
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/tests/test_fans_os.robot b/tests/test_fans_os.robot
index 98fce54..ad150f5 100755
--- a/tests/test_fans_os.robot
+++ b/tests/test_fans_os.robot
@@ -292,7 +292,7 @@
 
     Reset Fans
     Run Key U  Sleep \ 15s
-    Delete Error Logs
+    Delete All Error Logs
     Set System LED State  front_fault  Off
     Set System LED State  rear_fault  Off
 
@@ -303,6 +303,6 @@
     FFDC On Test Case Fail
     Reset Fans
     Run Key U  Sleep \ 15s
-    Delete Error Logs
+    Delete All Error Logs
     Set System LED State  front_fault  Off
     Set System LED State  rear_fault  Off