tweak the variables on the provision_slurm role

Former-commit-id: ddd728e3

roles/provision_slurm/vars/main.yml

 ---
 use_active_directory: False
 provision_slurm: /usr/local/sbin/provision_slurm.py
-search_filter: "{% if use_active_directory %}(unixHomeDirectory=*){% else %} (objectClass=posixAccount) {% endif %}"
+search_filter: "{% if use_active_directory %}(unixHomeDirectory=*){% else %}(objectClass=posixAccount){% endif %}"