Extending DT timeout

Change-Id: I90d25a0fc6a0bf8885170da186b0eae2a334c62c
diff --git a/jjb/pipeline/voltha-dt-physical-functional-tests.groovy b/jjb/pipeline/voltha-dt-physical-functional-tests.groovy
index 180bf00..43abe03 100644
--- a/jjb/pipeline/voltha-dt-physical-functional-tests.groovy
+++ b/jjb/pipeline/voltha-dt-physical-functional-tests.groovy
@@ -23,7 +23,7 @@
     label "${params.buildNode}"
   }
   options {
-    timeout(time: 180, unit: 'MINUTES')
+    timeout(time: 240, unit: 'MINUTES')
   }
 
   environment {