Define cluster network with cephadm bootstrap

Fixes #139.

Author: priteau

roles/cephadm/tasks/bootstrap.yml

@@ -17,6 +17,7 @@
          {{ firewalld }}
          --ssh-private-key={{ cephadm_ssh_private_key }}
          --ssh-public-key={{ cephadm_ssh_public_key }}
+         --cluster-network {{ cephadm_cluster_network }}
          {% if cephadm_ssh_user | length > 0 %}
          --ssh-user "{{ cephadm_ssh_user }}"
          {% endif %}
@@ -41,13 +42,6 @@
   become: true
   changed_when: true
 
-- name: Set cluster network
-  command:
-    cmd: "cephadm shell -- ceph config set mon cluster_network {{ cephadm_cluster_network }}"
-  when: cephadm_cluster_network | length > 0
-  become: true
-  changed_when: true
-
 - name: Set HAProxy image
   command:
     cmd: "cephadm shell -- ceph config set mgr mgr/cephadm/container_image_haproxy {{ cephadm_haproxy_image }}"