setting logs to DEBUG in voltha e2e tests

Change-Id: I0f9c96bacd825e150802eb8f259a2dc6178bb43f
diff --git a/jjb/pipeline/voltha-go-tests.groovy b/jjb/pipeline/voltha-go-tests.groovy
index f5c0e5f..f20c69e 100644
--- a/jjb/pipeline/voltha-go-tests.groovy
+++ b/jjb/pipeline/voltha-go-tests.groovy
@@ -40,7 +40,7 @@
       steps {
         sh """
            cd kind-voltha/
-           TYPE=minimal WITH_RADIUS=y WITH_TP=no WITH_BBSIM=y ./voltha up
+           VOLTHA_LOG_LEVEL=DEBUG TYPE=minimal WITH_RADIUS=y WITH_TP=no WITH_BBSIM=y ./voltha up
            """
       }
     }