ceph-config: always set _osd_memory_target

this should be set when rolling_update is true as well, otherwise, it will reset to default on the upgrade

Signed-off-by: Seena Fallah <seenafallah@gmail.com>
(cherry picked from commit ac4dfa7526)

roles/ceph-config/tasks/main.yml

@@ -98,6 +98,9 @@
       when:
         - devices | default([]) | length > 0
 
+- name: set osd related config facts
+  when: inventory_hostname in groups.get(osd_group_name, [])
+  block:
     - name: set_fact osd_memory_target, override from ceph_conf_overrides
       set_fact:
         osd_memory_target: "{{ item }}"