Comment 143 for bug 1684993

Reviewed: https://review.opencontrail.org/47319
Committed: http://github.com/Juniper/contrail-controller/commit/d3512f407a90f9df038d36e5ce8f9f4ba80f70e5
Submitter: Abhay Joshi (<email address hidden>)
Branch: R3.2

commit d3512f407a90f9df038d36e5ce8f9f4ba80f70e5
Author: Ananth Suryanarayana <email address hidden>
Date: Mon Nov 26 11:21:41 2018 -0800

Do not insert already sleeping tbb task back into sleeping list

During testing, it was found that tbb sleeping threads singly linked
list was corrupted and had become circular. This seemingly caused
my_slack count to get permanently stuck at -1, as the sleeping list
traversal would potentially never end.

During testing, using a specific assert, it was confirmed that duplicate
insertion did happen.

Fixed it by modifying the sleeing threads singly linked list into a
doubly linked list and then making sure that a thread if already in
the list is never prepended back as the head of the list.

Also take commit db50e81685290df3da491b31e51d0c5a20c63c0f to fix build with
newer TBB.

https://github.com/01org/tbb/issues/86

Change-Id: I83a7d267d4558c02715c675db5fc08f58f1208e2
Depends-On: I79bcd7192ea7c7db732b191503d0747e4b0ff229
Closes-Bug: #1684993