Updated pipelines for Voltha-2.8 release

Change-Id: I53ca9a5418a73299165bbc00ad655288734fd35e
diff --git a/jjb/verify/voltha-system-tests.yaml b/jjb/verify/voltha-system-tests.yaml
index c068b55..d17c0b9 100644
--- a/jjb/verify/voltha-system-tests.yaml
+++ b/jjb/verify/voltha-system-tests.yaml
@@ -9,10 +9,10 @@
       - 'verify-voltha-system-tests-jobs':
           build-node: 'ubuntu18.04-basebuild-4c-8g'
           branch-regexp: '{all-branches-regexp}'
-      - 'verify-voltha-system-tests-jobs-voltha-2.7':
+      - 'verify-voltha-system-tests-jobs-voltha-2.8':
           build-node:  'ubuntu18.04-basebuild-4c-8g'
-          name-extension: '-voltha-2.7'
-          override-branch: 'voltha-2.7'
+          name-extension: '-voltha-2.8'
+          override-branch: 'voltha-2.8'
           branch-regexp: '{kind-voltha-regexp}'
       - 'verify-voltha-system-tests-jobs-master':
           build-node:  'ubuntu18.04-basebuild-4c-8g'
@@ -30,10 +30,10 @@
           junit-allow-empty-results: true
 
 - job-group:
-    name: 'verify-voltha-system-tests-jobs-voltha-2.7'
+    name: 'verify-voltha-system-tests-jobs-voltha-2.8'
     jobs:
       - 'voltha-patch-test':
-          pipeline-script: 'voltha/voltha-2.7/bbsim-tests.groovy'
+          pipeline-script: 'voltha/voltha-2.8/bbsim-tests.groovy'
 
 - job-group:
     name: 'verify-voltha-system-tests-jobs-master'