removing hard-coded home dir from siab tests

Change-Id: Ibb5cddd6b238192bafad65d57ea27a8c22c103ad
diff --git a/src/test/cord-api/Tests/WorkflowValidations/SIAB.robot b/src/test/cord-api/Tests/WorkflowValidations/SIAB.robot
index d68fe25..731b6d5 100644
--- a/src/test/cord-api/Tests/WorkflowValidations/SIAB.robot
+++ b/src/test/cord-api/Tests/WorkflowValidations/SIAB.robot
@@ -23,7 +23,7 @@
 Library           OperatingSystem
 Library           XML
 Library           RequestsLibrary
-Library           /home/cord/voltha/tests/atests/common/testCaseUtils.py
+Library           %{HOME}/voltha/tests/atests/common/testCaseUtils.py
 Library           ../../Framework/utils/utils.py
 Resource          ../../Framework/utils/utils.robot
 Library           ../../Framework/restApi.py