This update enhanced keystone-api-proxy to take a sync_endpoint
parameter from its configuration file and enqueue job for dcorch with
that sync_endpoint type. If sync_endpoint doesn't present in its
configuration file, it will use the default endpoint type to enqueue
job.
Change-Id: I85698638cee2598955c4deb41a6b8033b0ace9fd
Story: 2004766
Task: 36156
Depends-On: https://review.opendev.org/#/c/682062/
Signed-off-by: Andy Ning <andy.ning@windriver.com>