Comment 2 for bug 1220112

Reviewed: https://review.openstack.org/44839
Committed: http://github.com/openstack/nova/commit/035f05eb531cb8dd805685272d46ecd8cb0ad2b3
Submitter: Jenkins
Branch: master

commit 035f05eb531cb8dd805685272d46ecd8cb0ad2b3
Author: Nikola Dipanov <email address hidden>
Date: Tue Sep 3 11:08:39 2013 +0200

    Scheduler rpcapi 2.9 is not backwards compatible

    Patch 552693e4ad51291c8bfd28cd1939ed3609f6eeac which added scheduler
    rpcapi version 2.9 does not provide any backwards compatibility.

    This patch adds the check using 'self.can_send_version', and falls
    back to the latest Grizzly compatible version if it the version is
    capped.

    Also takes the opportunity to make the docstring more consistent in the
    scheduler rpcapi SchedulerAPI class.

    Closes-bug: #1220112

    Change-Id: I5a1e08c1066cae00d47def45f7b87846f679cbbe