[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/vars/installVoltctl.groovy b/vars/installVoltctl.groovy
index cfc525d..93963c3 100644
--- a/vars/installVoltctl.groovy
+++ b/vars/installVoltctl.groovy
@@ -58,17 +58,18 @@
 
       umask 022
 
-      declare volt_dir='~/.volt'
-      declare volt_cfg='~/.volt/config'
+      declare volt_dir=\$HOME/.volt
+      declare volt_cfg=\$HOME/.volt/config
 
       echo
-      echo "** Fixing perms: \$volt_cfg"
-      mkdir -p "\$volt_dir"
-      chmod -R u+w,go-rwx "\$volt_dir"
-      chmod u=rwx "\$volt_dir"
-      touch "\$volt_cfg"
-      /bin/ls -l "\$volt_dir"
+      echo "** Fixing perms: \$volt_cfg
+      mkdir -p \$volt_dir
+      chmod -R u+w,go-rwx \$volt_dir
+      chmod u=rwx \$volt_dir
+      touch \$volt_cfg
+      /bin/ls -l \$volt_dir
 """)
+
     leave('fixPerms')
     return
 }