role service-prometheus: fix loop statements

roles/service-prometheus/tasks/alertmanager.yml

@@ -35,12 +35,11 @@
 
 - name: mkdir for alertmanager data (silences.json for now)
   file:
-    path: "{{ item }}"
+    path: "{{ alertmanager_db_path }}"
     state: directory
     owner: "{{ prometheus_user }}"
     group: "{{ prometheus_group }}"
     mode: "u=rwx,g=rx,o="
-  loop: "{{ alertmanager_db_path }}"
 
 - name: copy alertmanager systemd config
   template:

roles/service-prometheus/tasks/prometheus.yml

@@ -54,7 +54,7 @@
     src: "{{ playbook_dir }}/{{ item.value.src }}"
     dest: "{{ prometheus_rule_path }}/{{ item.value.dest }}"
     validate: "{{ prometheus_daemon_dir }}/promtool check rules %s"
-  loop: '{{ prometheus_rule_files | dict2items | default({}) }}'
+  loop: '{{ prometheus_rule_files | default({}) | dict2items }}'
   notify:
     - restart prometheus