Fix typo in documentation
Fix typo in documentation

This patch just removes a duplicate 'the'.

Change-Id: I3393a51d55ba8ec1639c2548781f8972f0d5c9d0

group-policy/devstack,dtroyer/devstack,richliu/devstack,dtroyer/devstack,openstack-dev/devstack,nawawi/openstack,group-policy/devstack,nawawi/openstack,openstack-dev/devstack,bswartz/devstack,noironetworks/devstack,bswartz/devstack,noironetworks/devstack,richliu/devstack