[VOL-4395] (Part of) Added support to enable/disable per-test voltha logging in bbsim based periodic job

Change-Id: I1fafbe7812d45ff38d0b8bcaee11a41a76b8994d
diff --git a/tests/functional/Voltha_ONOSHATests.robot b/tests/functional/Voltha_ONOSHATests.robot
index 809a945..73ca6da 100644
--- a/tests/functional/Voltha_ONOSHATests.robot
+++ b/tests/functional/Voltha_ONOSHATests.robot
@@ -57,6 +57,10 @@
 # Per-test logging on failure is turned off by default; set this variable to enable
 ${container_log_dir}    ${None}
 
+# logging flag to enable Voltha Components Logging, can be passed via the command line too
+# example: -v logging:False
+${logging}    True
+
 *** Test Cases ***
 Verify restart ONOS instace master of device after subscriber is provisioned
     [Documentation]    Restat ONOS instance master of a given device and check that during restart and after the