Comment 4 for bug 1665498

Reviewed: https://review.openstack.org/453121
Committed: https://git.openstack.org/cgit/openstack/networking-fujitsu/commit/?id=f9c67e3686607f1ede6d0a2cc6894d8cef8d6078
Submitter: Jenkins
Branch: stable/ocata

commit f9c67e3686607f1ede6d0a2cc6894d8cef8d6078
Author: takanorimiyagishi <email address hidden>
Date: Wed Mar 29 15:18:12 2017 +0900

    Close ssh for setup_vlan when error has occurred

    Put following process on setup_vlan() into try statement to close ssh
    session when an exception is raised while processing these method.
      self.client.connect()
      self.client.set_vlan()
      self.client.disconnect()

    Change-Id: Ice3d7d897df130d4bdf4a7d434213b97874af9cc
    Closes-Bug: #1665498
    (cherry picked from commit e5872b3b4e9338d240d87b28e8d8fc21474b97e2)