[VOL-5124] - Fix perms on ~/.volt/config

vars/installVoltctl.groovy
--------------------------
  o Remove quotes added to protect value of shell var expansion.
  o Triple quoted vars passed to sh() require an escaped dollar sign.
  o Combination of nested quotes resulted in a literal value with
    unexpanded tilda being used.

Change-Id: I91495da1f7c618d955a87832514d0acbc5f9f438
diff --git a/jjb/voltha-e2e/voltha-2.8.yaml b/jjb/voltha-e2e/voltha-2.8.yaml
index 4713a1a..994a79d 100644
--- a/jjb/voltha-e2e/voltha-2.8.yaml
+++ b/jjb/voltha-e2e/voltha-2.8.yaml
@@ -57,7 +57,7 @@
           extraHelmFlags: '--set onu=2,pon=2 --set kafka.externalAccess.enabled=true,kafka.externalAccess.service.type=NodePort,kafka.externalAccess.service.nodePorts[0]=30201,kafka.externalAccess.service.domain=127.0.0.1'
           olts: 2
           timeout: 180
-          logLevel: 'INFO'
+          logLevel: 'DEBUG'
           testTargets: |
             - target: voltha-pm-data-multiolt-kind-att
               workflow: att