Correcting typo on doc.
Correcting typo on doc.

Fix for typo in zaqar documentation -:

  * Ref doc link - Doc Link - https://docs.openstack.org/project-install-guide/messaging/newton/verify.html
  * There is typo in string  "X-Auth-ToKen:
  * Instead it should be "X-Auth-Token:
  * This patch fixes the typo for letter k in string Token

Change-Id: I6644b2601754914166d29cf1e1af98f8e8f265e8
Closes-Bug: #1718414

openstack/zaqar,openstack/zaqar,openstack/zaqar,openstack/zaqar