disable sandboxing for mgmt_tooling

it needs more access to iterate available node and their labels. tooling
is fairly elevated anyway, so it makes no difference.

Author: hsitter

jenkins-jobs/xenon/mgmt_tooling.rb

@@ -23,6 +23,6 @@
 # Clones, tests and deploys tooling to all slaves.
 class MGMTTooling < PipelineJob
   def initialize
-    super('mgmt_tooling', template: 'mgmt_tooling')
+    super('mgmt_tooling', template: 'mgmt_tooling', sandbox: false)
   end
 end