code comments incorrectness

[Zhou Jianming]

I am running OpenStack Mitaka on CentOS7.1 with VMware vSphere 5.5 Enterprise Plus.
In function get_datastore() of nova/virt/vmwareapi/ds_utils.py file, the following code comments:
      ......
      datastore_ret = session._call_method(vutil,
                                           "get_object_property",
                                           object,
                                           "datastore")
      # If there are no hosts in the cluster then an empty string is returned.
      if not datastore_ret:
          raise exception.DatastoreNotFound()

      ......

According to context, I think this comments are incorrectness:
   1) We get datastore objects, not hosts object.
   2) If there are no datastores in the cluster then raise exception, not return an empty string.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/449416
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=65a2c63acf6b5e9d38ef3caa2928eebcc62486a2
Submitter: Jenkins
Branch: master

commit 65a2c63acf6b5e9d38ef3caa2928eebcc62486a2
Author: Zhou Jianming <email address hidden>
Date: Thu Mar 23 11:12:47 2017 +0800

    code comments incorrectness

    Closes-Bug: #1674259

    Change-Id: I5318bc274832b316c017df087f06bb4254a270e1

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/nova 16.0.0.0b2 development milestone.