This change is to create 2nd thread to provide concurrent service. In a
different commit [1], the haproxy is to be configured to distribute the
slow requests to the 2nd thread, and the fast requests to the primiary
thread.
TCs:
passed: concurrent keystone requests of "software upload/
deploy precheck/deploy start" and "software list/deploy show/
deploy host-list"
passed: keystone authenticated "software deploy precheck"
request completed.
Story: 2010676
Task: 49647
[1] https://review.opendev.org/c/starlingx/stx-puppet/+/910644
Change-Id: I0e8e8ac1b5177f1bbf40e047335c075b0a471fc1
Signed-off-by: Bin Qian <bin.qian@windriver.com>