set debug level for unitag subscriber tt test bbsim

Change-Id: I7f052095ac6564f77d1b26a7135725f3d03dbbed
diff --git a/jjb/voltha-e2e.yaml b/jjb/voltha-e2e.yaml
index b0b8399..3086a3e 100755
--- a/jjb/voltha-e2e.yaml
+++ b/jjb/voltha-e2e.yaml
@@ -1078,6 +1078,7 @@
           code-branch: 'master'
           extraHelmFlags: '--set global.image_tag=master --set onos-classic.image.tag=master --set onos-classic.replicas=3,onos-classic.atomix.replicas=3 --set voltha.onos_classic.replicas=3 '
           time-trigger: "H H/23 * * *"
+          logLevel: 'DEBUG'
           robot-args: '-v unitag_sub:True'
           testTargets: |
             - target: functional-single-kind-tt