increase timeout on the test job

Change-Id: I10a6129b03447d4036137efdbc66228c37635eb8
diff --git a/jjb/pipeline/voltha-physical-functional-tests.groovy b/jjb/pipeline/voltha-physical-functional-tests.groovy
index 47ace1e..22eca23 100644
--- a/jjb/pipeline/voltha-physical-functional-tests.groovy
+++ b/jjb/pipeline/voltha-physical-functional-tests.groovy
@@ -23,7 +23,7 @@
     label "${params.buildNode}"
   }
   options {
-    timeout(time: 90, unit: 'MINUTES')
+    timeout(time: 120, unit: 'MINUTES')
   }
 
   environment {