[VOL-4237] Keep log files unless  is set to false

Change-Id: I2d11554b49c12d13c354f0c5f883962e4d8f10bc
diff --git a/tests/functional/Voltha_StartContainerPODTests.robot b/tests/functional/Voltha_StartContainerPODTests.robot
index fd6e0c4..e0c69c4 100755
--- a/tests/functional/Voltha_StartContainerPODTests.robot
+++ b/tests/functional/Voltha_StartContainerPODTests.robot
@@ -56,6 +56,11 @@
 ${kind_voltha_dir}    ~/kind-voltha
 # Per-test logging on failure is turned off by default; set this variable to enable
 ${container_log_dir}    ${None}
+
+# logging flag to enable Collect Logs, can be passed via the command line too
+# example: -v logging:False
+${logging}    True
+
 ${pausebeforesanity}    False
 ${onos_version}    ${EMPTY}