Moving verification jobs to 2.7

Change-Id: I010aa6bfff687a0e1ecdf185211d5da2ba58bbd8
diff --git a/jjb/verify/kind-voltha.yaml b/jjb/verify/kind-voltha.yaml
index 952b1c0..f90f16f 100644
--- a/jjb/verify/kind-voltha.yaml
+++ b/jjb/verify/kind-voltha.yaml
@@ -22,5 +22,5 @@
           pipeline-script: 'voltha-bbsim-tests.groovy'
       - 'voltha-patch-test':
           pipeline-script: 'voltha-bbsim-tests.groovy'
-          name-extension: '-2.6'
-          override-branch: 'voltha-2.6'
+          name-extension: '-2.7'
+          override-branch: 'voltha-2.7'