xenapi: agent set password fails badly when there is a timeout

[John Garbutt]

No agent failures are skipped, the set password fails badly when there is a timeout:

AgentTimeout: Unable to contact guest agent. The following call timed out: key_init

leads to:

in _exchange_key_with_agent
    agent_pub = int(resp)
TypeError: int() argument must be a string or a number, not 'NoneType'

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/52688

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/52688
Committed: http://github.com/openstack/nova/commit/c3aa5583d3539744c3aa104f4b450e45ce298be2
Submitter: Jenkins
Branch: master

commit c3aa5583d3539744c3aa104f4b450e45ce298be2
Author: John Garbutt <email address hidden>
Date: Fri Oct 18 18:48:29 2013 +0100

    xenapi: stop key_init timeout failing set password

    When key-init timeout occurs, it returns None, which causes the
    set-password to fail with an error casting None to int.

    This code ensures it fails silently as intended.

    Fixes bug 1241738
    Change-Id: I080807c5728f94a6b36957efd6f2bbc44a76b1cd