Comment 2 for bug 1237303

Reviewed: https://review.openstack.org/50604
Committed: http://github.com/openstack/nova/commit/c2ae5fb5659faeadc6f4d8afe27eb68e3c0ade0c
Submitter: Jenkins
Branch: master

commit c2ae5fb5659faeadc6f4d8afe27eb68e3c0ade0c
Author: Jay Lau <email address hidden>
Date: Wed Oct 9 19:54:43 2013 +0800

    Update log message for add_host_to_aggregate

    When add host to aggregates with availability zone, if the host
    is already in one availability zone, then the host cannot be added
    to another availability zone.

    When user do above operation, nova api will report error message,
    but the error message does not include blank space between
    <availability zone> and zone name, also the error message include
    two periods.

    The fix was adding blank space and removes one period for the message.

    Change-Id: I7307288be194d3ce6de05b77433bbe2626ae46d9
    Closes-bug: #1237303