BigSwitch: should call eventlet sleep in watchdog

[Kevin Benton]

The consistency watchdog in eventlet currently calls time.sleep which will block other greenthreads who are members of the same pool.

https://github.com/openstack/neutron/blob/288e3127440158f177beaae1972236def4916251/neutron/plugins/bigswitch/servermanager.py#L554

It should use eventlet.sleep so it yields to other members of the same pool.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/80130

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/80130
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=402175a787c2064404eaf7c260a16ea05e9a99a3
Submitter: Jenkins
Branch: master

commit 402175a787c2064404eaf7c260a16ea05e9a99a3
Author: Kevin Benton <email address hidden>
Date: Wed Mar 12 17:47:28 2014 -0700

    BigSwitch: Use eventlet.sleep in watchdog

    Changes the consistency watchdog that runs
    in the background to use eventlet.sleep instead
    of time.sleep to avoid blocking other members of
    the same pool.

    Closes-Bug: #1291695
    Change-Id: I5ec842cca1063cef761c2cd09d63617baf27d191