Setup /var/run/dcmanager_orchestrator_tmp as orchestrator temp dir

dcmanager-orchestrator call the k8s python client to perform a
number of operations. The k8s python client creates temp files under
/tmp and continues use these tmp files for the life-cycle of the
processes.

However systemd-tmpfiles-clean.service will run every day to clean up
files in /tmp dir that are older than 10 days. If the k8s client code
is not triggered for more than 10 days (thus its temp files are not
accessed for more than 10 days), these temp files will be removed as
part of the cleanup. Certain dcmanager-orchestrator operations then
starts to fail with an error that the tmp file is no longer there.

This is a known issue of kubernetes python client:
kubernetes-client/python#765

The commit fixes this issue by setting TMPDIR to /var/run/dcmanager_
orchestrator_tmp when sm starts dcmanager-orchestrator.

The following similar commits were added for sysinv,dcmanager
services in the past
https://review.opendev.org/c/starlingx/config/+/736761
https://review.opendev.org/c/starlingx/distcloud/+/736247

Closes-bug: 2066048

Change-Id: I3d39f5b034e3ef2e6ad9636e86f26f0e93f16d45
Signed-off-by: amantri <[email protected]>

Author: amantri

distributedcloud/ocf/dcmanager-orchestrator

@@ -38,6 +38,8 @@ OCF_RESKEY_pid_default="$HA_RSCTMP/$OCF_RESOURCE_INSTANCE.pid"
 : ${OCF_RESKEY_user=${OCF_RESKEY_user_default}}
 : ${OCF_RESKEY_pid=${OCF_RESKEY_pid_default}}
 
+export TMPDIR=/var/run/dcmanager_orchestrator_tmp
+
 #######################################################################
 
 usage() {