tree cc07ae9d8f7f40ac918caca956483c1a935145b0
parent 85610b43e365ae09974cbf6ebce265aca0dd1867
author Adithya Chakilam <achakilam@nvidia.com> 1757341398 -0500
committer Adithya Chakilam <achakilam@nvidia.com> 1757361453 -0500

Share the threads/permits for soft maxes

```
[quota "project-a"]
    softMaxStartPerUserForQueue = 5 SSH-Interactive-Worker
[quota "project-b"]
    softMaxStartPerUserForQueue = 10 SSH-Interactive-Worker
```

Previously, for the above configuration, The computation of free threads
was buggy since each instance is not aware of the permits acquired by
the other quota. This results in config not being enforced correctly.
Fix this to only have single shared QueueStats object.

Change-Id: I7e19bc4370c8fd30e158092f7b0d1f12e59fa5e2