removing all hardcoded references to the namespace

Change-Id: I9b5ddc065be62b3ad2a5a4757a88001faca61146
diff --git a/libraries/onu_utilities.robot b/libraries/onu_utilities.robot
index fb0e92a..70476a9 100755
--- a/libraries/onu_utilities.robot
+++ b/libraries/onu_utilities.robot
@@ -164,7 +164,7 @@
     [Documentation]    This keyword kills the passed adaptor.
     [Arguments]    ${namespace}    ${name}
     ${cmd}    Catenate
-    ...    kubectl exec -it -n voltha $(kubectl get pods -n ${namespace} | grep ${name} | awk 'NR==1{print $1}')
+    ...    kubectl exec -it -n ${namespace} $(kubectl get pods -n ${namespace} | grep ${name} | awk 'NR==1{print $1}')
     ...     -- /bin/sh -c "kill 1"
     ${rc}    ${output}=    Run and Return Rc and Output    ${cmd}
     Log    ${output}