[VOL-3717] Allowing to pass the olt type via pod-configs yaml file

Change-Id: Ic3873d05d15b40bbbac02eb1d221644a7aaa4c56
diff --git a/tests/functional/K8S_SystemTest.robot b/tests/functional/K8S_SystemTest.robot
index 13c55bc..13023ef 100644
--- a/tests/functional/K8S_SystemTest.robot
+++ b/tests/functional/K8S_SystemTest.robot
@@ -36,7 +36,7 @@
 ${common_pod_label_key}    app
 ${rwcore_pod_label_value}    rw-core
 ${ofagent_pod_label_value}    ofagent
-${adapter_openolt_pod_label_value}    adapter-open-olt
+${adapter_openolt_pod_label_value}    ${OLT_ADAPTER_APP_LABEL}
 ${teardown_device}      false
 ${has_dataplane}        false