designate pool-manager fail to start

[Yongfeng Du]

The fail message is as follow:
===========================
database is active @ 192.168.0.39
Traceback (most recent call last):
  File "/usr/bin/designate-pool-manager", line 6, in <module>
    from designate.cmd.pool_manager import main
  File "/usr/lib/python2.7/site-packages/designate/cmd/pool_manager.py", line 24, in <module>
    from designate.pool_manager import service as pool_manager_service
  File "/usr/lib/python2.7/site-packages/designate/pool_manager/service.py", line 25, in <module>
    from designate import coordination
  File "/usr/lib/python2.7/site-packages/designate/coordination.py", line 24, in <module>
    import tooz.coordination
ImportError: No module named tooz.coordination
===========================

It turns out that designate added new dependency on tooz,
https://git.openstack.org/cgit/openstack/designate/commit/requirements.txt?id=0642ad4f1460a5daf70901bb27b78a249f9ce2ad
But the package installation doesn't reflect this.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/203946
Committed: https://git.openstack.org/cgit/stackforge/kolla/commit/?id=13dea8ea5cf1857a456f406eae2776d1fcd2ef04
Submitter: Jenkins
Branch: master

commit 13dea8ea5cf1857a456f406eae2776d1fcd2ef04
Author: Yongfeng Du <email address hidden>
Date: Tue Jul 21 14:59:46 2015 +0800

    Install tooz for designate pool manager

    designate added tooz as dependency, but this is not reflected in package
    installation, so workaround this by yum install python-tooz

    Change-Id: Ia1b69d3feb7379131371db75a25eefb949a66758
    Closes-Bug: #1476578