Comment 2 for bug 1588305

Reviewed: https://review.openstack.org/324379
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=8093b764a9430a4e1c8cf2d73068f08117fec90e
Submitter: Jenkins
Branch: master

commit 8093b764a9430a4e1c8cf2d73068f08117fec90e
Author: zte-hanrong <email address hidden>
Date: Thu Jun 2 19:23:46 2016 +0800

    Fix nova-compute start failed when reserved_huge_pages has value.

    The problem is due to this change:
    https://review.openstack.org/#/c/292499/20/nova/conf/virt.py

    The code of item_type=types.Dict is not correct, modfiy by
    item_type=types.Dict().

    Modify the usage discription of config of reserved_huge_pages.
    Usage of oslo_config.types.Dict is key:value pairs separated by
    commas.

    Add unit test because this is a complicated option that might not work
    like people expect.

    Closes-Bug:#1588305
    Change-Id: I06490866f24617cf99764ede73a1938c2d7b7b5c