Fujitsu DX Driver: Fix exception in terminate_connection with no connector

[ZhaTingting]

Fujitsu ETERNUS CI 'test_force_detach_volume' test was failed because of terminate_connection being called without connector.

See stack trace below:

Traceback (most recent call last):
   File "/opt/stack/new/cinder/cinder/volume/manager.py", line 1777, in terminate_connection
     force=force)
   File "/opt/stack/new/cinder/cinder/zonemanager/utils.py", line 104, in decorator
     conn_info = terminate_connection(self, *args, **kwargs)
   File "/opt/stack/new/cinder/cinder/volume/drivers/fujitsu/eternus_dx_fc.py", line 176, in terminate_connection
     {'vid': volume['id'], 'wwpns': connector['wwpns']})
TypeError: 'NoneType' object has no attribute '__getitem__'

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/490342

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/490342
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=2d888670817a1761e27d7482267ad1fcab0443a9
Submitter: Jenkins
Branch: master

commit 2d888670817a1761e27d7482267ad1fcab0443a9
Author: Tingting Zha <email address hidden>
Date: Thu Aug 3 14:14:07 2017 +0800

    Fujitsu Driver: Fix exception in terminate_connection with no connector

    Force-detach should be ok when connector is None. When connector
    is None, we change the driver to detach the volume from anything
    its attached to.

    Change-Id: I244e392ff00ef333a4ea823fb7b27da457c4fcea
    Closes-Bug: #1708329

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/cinder 11.0.0.0rc1 release candidate.