svc-db-openldap: make LDIF import idempotent, unify container var, and tidy role

- Add handlers/main.yml to load memberof/refint modules and import groups via docker exec
- Use OPENLDAP_CONTAINER consistently (replace OPENLDAP_NAME)
- Rename tasks/ldifs_creation.yml -> tasks/_ldifs_creation.yml and update includes
- Drop default param from get_app_conf calls; add explicit meta: flush_handlers
- docker-compose: honor OPENLDAP_NETWORK_EXPOSE_LOCAL | bool; minor formatting
- env template: formatting/comments consistency
- Remove unused 01_rbac_group.ldif.j2; rename 02_rbac_roles -> 01_rbac_roles and fix filter to LDAP
- vars: rename OPENLDAP_NAME -> OPENLDAP_CONTAINER; prune LDIF schema type

Conversation: https://chatgpt.com/share/68d1d25d-e788-800f-bfb6-13b1f5bc6121

roles/svc-db-openldap/templates/ldif/groups/01_rbac_roles.ldif.j2

@@ -0,0 +1,23 @@
+{% for dn, entry in (applications | build_ldap_role_entries(users, LDAP)).items() %}
+
+dn: {{ dn }}
+{% for oc in entry.objectClass %}
+objectClass: {{ oc }}
+{% endfor %}
+{% if entry.gidNumber is defined %}
+gidNumber: {{ entry.gidNumber }}
+{% endif %}
+cn: {{ entry.cn }}
+description: {{ entry.description }}
+{% if entry.memberUid is defined %}
+{% for uid in entry.memberUid %}
+memberUid: {{ uid }}
+{% endfor %}
+{% endif %}
+{% if entry.member is defined %}
+{% for m in entry.member %}
+member: {{ m }}
+{% endfor %}
+{% endif %}
+
+{% endfor %}