provisioning: Use .tmp suffix for test file

provisioning: Use .tmp suffix for test file

We can use .tmp suffix for generated files to be ignored in git repo

Bug: https://jira.iotivity.org/browse/IOT-2599
Change-Id: I70d109e590784777a0ce2a87fa7451676bad20e8
Signed-off-by: Philippe Coval <philippe.coval@osg.samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/21999
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: Mats Wichmann <mats@linux.com>
Reviewed-by: Dan Mihai <Daniel.Mihai@microsoft.com>
Reviewed-by: Randeep Singh <randeep.s@samsung.com>
(cherry picked from commit a8abd0026c9fc8c8e6679202168f79c6206eff72)