OLT memory dump was writen to the wrong file.

Change-Id: If22c06641e278a910b4754d721eea0ccfcfcb7a6
diff --git a/tests/memory-leak/VOLTHA_Memory_Leak_Tests.robot b/tests/memory-leak/VOLTHA_Memory_Leak_Tests.robot
index d2de12e..120cf92 100755
--- a/tests/memory-leak/VOLTHA_Memory_Leak_Tests.robot
+++ b/tests/memory-leak/VOLTHA_Memory_Leak_Tests.robot
@@ -263,7 +263,7 @@
         ...    Iteration ${formatedIt}
     END
     Wait Until Keyword Succeeds    500s    30s
-    ...        Validate Memory Consumptions  adapter-open-olt  ${NAMESPACE}  ${setup_mem_consumption_olt}  ${output_file_onu}
+    ...        Validate Memory Consumptions  adapter-open-olt  ${NAMESPACE}  ${setup_mem_consumption_olt}  ${output_file_olt}
     ...        out_string=Validate
     [Teardown]    Run Keywords    Printout ONU Serial Number and Device Id    print2console=${print2console}
     ...    AND    Run Keyword If    ${logging}    Get Logical Id of OLT