d4science-ghn-cluster/orientdb.yml: Add 'serial' and 'max_fail_percentage' to the playbook.

library/roles/orientdb/tasks/main.yml: Add a specific tag for the hooks task.

orientdb/tasks/main.yml

@@ -35,11 +35,13 @@
     - name: Remove the old hook jars
       shell: rm {{ orientdb_install_dir }}/lib/{{ item }}
       with_items: '{{ orientdb_hooks_to_be_removed | default([]) }}'
+      tags: [ 'orientdb', 'orientdb_hooks' ]
 
     - name: Fetch and install the hook jars
       get_url: url='{{ item }}' dest={{ orientdb_install_dir }}/lib
       with_items: '{{ orientdb_hooks_jars | default([]) }}'
       notify: Restart orientdb
+      tags: [ 'orientdb', 'orientdb_hooks' ]
 
     - name: Install the orientdb default settings
       template: src=orientdb.default.j2 dest=/etc/default/orientdb owner=root group=root mode=0444