Revert "Moving per patchset jobs on 'voltha-scale-2' cluster"

This reverts commit 74e64a5e2756fb5b20aad3b5a7abef20a8121ea3.

Reason for revert: Cluster voltha-scale-2 is not setup with a registry

Change-Id: I916049179718e268aafda48be54212e9cd0cf596
diff --git a/jjb/voltha-scale.yaml b/jjb/voltha-scale.yaml
index dba4207..ba193c1 100644
--- a/jjb/voltha-scale.yaml
+++ b/jjb/voltha-scale.yaml
@@ -344,7 +344,7 @@
       # per patchset job
       - 'voltha-scale-measurements':
           name: 'voltha-scale-measurements-patchset-1-16-32-att-subscribers'
-          build-node: 'voltha-scale-2'
+          build-node: 'onf-pod1-head-node'
           olts: 1
           pons: 16
           onus: 32
@@ -358,7 +358,7 @@
 
       - 'voltha-scale-measurements':
           name: 'voltha-scale-measurements-patchset-1-16-32-tt-subscribers'
-          build-node: 'voltha-scale-2'
+          build-node: 'onf-pod1-head-node'
           olts: 1
           pons: 16
           onus: 32
@@ -373,7 +373,7 @@
 
       - 'voltha-scale-measurements':
           name: 'voltha-scale-measurements-patchset-1-16-32-dt-subscribers'
-          build-node: 'voltha-scale-2'
+          build-node: 'onf-pod1-head-node'
           olts: 1
           pons: 16
           onus: 32