Fix a bug in the default OpenStack profile Neutron metadata agent config.

 NB: fix a "bug" in the default profile configuration of the metadata agent.
 This manifests under high load; the MDA calls to neutron via API if the
 internal RPC fails.  The profile wasn't setting this correctly; it's not
 in the install instructions.
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Status Job ID Name Coverage
  Test
passed #768
testing

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