duplicate allocation candidates with granular request

[Tetsuro Nakamura]

Description
===========

When we request shared resource granularly, we can get duplicate allocation candidates for a same resource provider

How to reproduce
================

1. Set up
    1-1. Set up two compute nodes (cn1, cn2 with VCPU resources)
    1-2. Set up one shared storage (ss1 with DISK_GB resources) marked with "MISC_SHARES_VIA_AGGREGATE"
    1-3. Put all of them in one aggregate

2. Request only DISK_GB resource with granular request
-> you will get duplicate allocation request of DISK_GB resource on ss1

(NOTE): non-granular requests don't provide such duplicate entry

[Matt Riedemann (mriedem)]

This should be reported as a story (bug) against placement in storyboard now:

https://storyboard.openstack.org/#!/project/1113

[Matt Riedemann (mriedem)]

https://storyboard.openstack.org/#!/project/openstack/placement

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/placement 1.0.0.0rc1 release candidate.