Comment 7 for bug 1158958

Reviewed: https://review.openstack.org/26867
Committed: http://github.com/openstack/nova/commit/232f874d3663248f2a82eb138c0e7bd142593746
Submitter: Jenkins
Branch: stable/grizzly

commit 232f874d3663248f2a82eb138c0e7bd142593746
Author: Dan Florea <email address hidden>
Date: Tue Mar 26 23:00:32 2013 -0700

    Convert host value from unicode to a string.

    The memcached API expects string format, not unicode.
    Convert the host value to a string before creating
    the cache_key and passing it to memcached.

    Fixes: bug #1158958
    Change-Id: I26e86b7fb61b4b3380a14686bd2faa9f58017999
    (cherry picked from commit a11c41b48dff83a91eaa65630cc6aeb0e51e6461)