ceph_osds is list so we don't need to itemize it

Also we have just one value in colocated scenario.

Change-Id: I6dab80aa476140e821a65544c39182c12b20c0b6

templates/cephosd.yaml.j2

@@ -5,12 +5,12 @@ parameter_defaults:
 {% endif %}
     CephAnsibleDisksConfig:
         devices:
-{% for key, value in ceph_osds.iteritems()|sort %}
-            - '{{ key }}'
+{% for osd in ceph_osds|sort %}
+            - '{{ osd }}'
 {% endfor %}
 {% if ceph_osds_non_collocated|default(false) %}
         dedicated_devices:
-{% for key, value in ceph_osds.iteritems()|sort %}
+{% for key, value in ceph_osds|sort %}
             - '{{ value.journal }}'
 {% endfor %}
         osd_scenario: non-collocated