Move hostname registration to common

The storage hostname is used in many conf files all over the place and
should be registered upon each run for every service

TrivialFix

Change-Id: I1d5a20cb6d51cee9f529cf2e1fb144158f7718a9

ansible/roles/ceph/tasks/config.yml

@@ -1,13 +1,4 @@
 ---
-- name: Looking up hostname
-  command: getent hosts {{ hostvars[inventory_hostname]['ansible_' + storage_interface]['ipv4']['address'] }}
-  changed_when: False
-  register: storage_hostname
-
-- name: Setting storage hostname
-  set_fact:
-    storage_hostname: "{{ storage_hostname.stdout.split()[1] }}"
-
 - name: Ensuring config directories exist
   file:
     path: "{{ node_config_directory }}/{{ item }}"

ansible/roles/common/tasks/config.yml

@@ -1,4 +1,13 @@
 ---
+- name: Looking up storage hostname
+  command: getent hosts {{ hostvars[inventory_hostname]['ansible_' + storage_interface]['ipv4']['address'] }}
+  changed_when: False
+  register: storage_hostname
+
+- name: Setting storage hostname
+  set_fact:
+    storage_hostname: "{{ storage_hostname.stdout.split()[1] }}"
+
 - name: Ensuring config directories exist
   file:
     path: "{{ node_config_directory }}/{{ item }}"