ProphetStor initialize_connection failed when the storage server heavy loading.

[Rick Chen]

ProphetStor storage initialize_connection failed when the storage server heavy loading.

2014-08-16 06:06:36,783 PoolWorker-15[28501]: ERROR - Invalid assign volume msg: local variable 'event_uuid' referenced before assignment

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/114735

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/114735
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=d9561b151e9b82258d60f73a961be92ab797b954
Submitter: Jenkins
Branch: master

commit d9561b151e9b82258d60f73a961be92ab797b954
Author: Rick Chen <email address hidden>
Date: Sat Aug 16 14:46:16 2014 +0800

    Failed to initialize connection

    Failed to initialize connection when the storage server heavy loading.
    Changed related on:
      dpl_iscsi and dpl_fc
        initialize_connection
        terminate_connection

    When storage server busy, the request api will receive httplib response
    code accepted and the response body include event uuid. The operation
    request use the event uuid to comfirm the job is completed or not.

    Change-Id: I4ad8283d355d6b53390e69123ed7b3ed873d4c4e
    Closes-Bug: 1357635