osds: wait for osds to be up before creating pools

This is a follow up on #2628.
Even with the openstack pools creation moved later in the playbook,
there is still an issue because OSDs are not all UP when trying to
create pools.

Adding a task which checks for all OSDs to be UP with a `retries/until`
condition should definitively fix this issue.

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1578086

Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>
(cherry picked from commit 9d5265fe11)
Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>

roles/ceph-osd/tasks/openstack_config.yml

@@ -1,4 +1,14 @@
 ---
+- name: wait for all osd to be up
+  shell: >
+    test "$({{ hostvars[groups[mon_group_name][0]]['docker_exec_cmd'] | default('') }} ceph --cluster {{ cluster }} -s -f json | python -c 'import sys, json; print(json.load(sys.stdin)["osdmap"]["osdmap"]["num_osds"])')" = 
+    "$({{ hostvars[groups[mon_group_name][0]]['docker_exec_cmd'] | default('') }} ceph --cluster {{ cluster }} -s -f json | python -c 'import sys, json; print(json.load(sys.stdin)["osdmap"]["osdmap"]["num_up_osds"])')"
+  register: wait_for_all_osds_up
+  retries: 30
+  delay: 10
+  delegate_to: "{{ groups[mon_group_name][0] }}"
+  until: wait_for_all_osds_up.rc == 0
+
 - name: list existing pool(s)
   command: >
     {{ hostvars[groups[mon_group_name][0]]['docker_exec_cmd'] | default('') }} ceph --cluster {{ cluster }}