Comment 2 for bug 1604116

Reviewed: https://review.openstack.org/344254
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=fcf2a644fbe6efc2bfd2810add36a099cadd959e
Submitter: Jenkins
Branch: master

commit fcf2a644fbe6efc2bfd2810add36a099cadd959e
Author: Vu Tran <email address hidden>
Date: Mon Aug 29 14:05:25 2016 -0400

    Not allow overcommit ratios to be negative

    Currently the three overcommit ratios: ram_allocation_ratio,
    cpu_allocation_ratio, and disk_allocation_ratio can be set to negative values.
    It's up to the scheduler filters to impose the checks on these ratios.

    It makes more sense to make sure these 3 ratios are not negative when
    nova-compute is started. If any of these ratios is negative then nova-compute
    service will fail to start.

    Closes-Bug: #1604116
    Change-Id: Ic960e319b59910c0178e81259b2e35435f2db592