Fix the overcloud symlink fix of "__oc_templates_folder"
Fix the overcloud symlink fix of "__oc_templates_folder"

Fix the fix [0].
When the overcloud redeployed with a different scenario, the
"__oc_templates_folder" needs to be reapplied to another templates
directory.
The "force" flag of the "file" module will fail to reapply the link as
it unable to do the reapply procedure.
This could be done only by removing the existing symlink previous to set
it.
Add the task to delete the symlink before set it back again.
This will exclude the failure of the scenario described above.

[0] - https://review.gerrithub.io/c/redhat-openstack/infrared/+/520247

Change-Id: Ied61c29f66d341fcf676081c9df63d97f7b4f54f

redhat-openstack/infrared,redhat-openstack/infrared,redhat-openstack/infrared