Address Ansible bare variable usage

When executing the role with Ansible 2.1, the following
deprecation warning is issued in the output for some tasks.

[DEPRECATION WARNING]: Using bare variables is deprecated.

This patch addresses the tasks to fix the behaviour appropriately.

Change-Id: I21615fa7fea8332487cd83854d1f0cd243165e9d

handlers/main.yml

@@ -43,5 +43,5 @@
     name: "{{ item }}"
     state: "restarted"
     pattern: "{{ item }}"
-  with_items: ceilometer_service_names
+  with_items: "{{ ceilometer_service_names }}"
   failed_when: false

tasks/ceilometer_install.yml

@@ -58,7 +58,7 @@
   until: install_packages|success
   retries: 5
   delay: 2
-  with_items: ceilometer_requires_pip_packages
+  with_items: "{{ ceilometer_requires_pip_packages }}"
 
 - name: Get local venv checksum
   stat:
@@ -149,7 +149,7 @@
   until: install_packages|success
   retries: 5
   delay: 2
-  with_items: ceilometer_pip_packages
+  with_items: "{{ ceilometer_pip_packages }}"
   when:
     - ceilometer_venv_enabled | bool
     - ceilometer_get_venv | failed or ceilometer_developer_mode | bool
@@ -165,7 +165,7 @@
   until: install_packages|success
   retries: 5
   delay: 2
-  with_items: ceilometer_pip_packages
+  with_items: "{{ ceilometer_pip_packages }}"
   when:
     - not ceilometer_developer_mode | bool
     - not ceilometer_venv_enabled | bool

tasks/install-apt.yml

@@ -19,7 +19,7 @@
   until: install_packages|success
   retries: 5
   delay: 2
-  with_items: ceilometer_apt_packages
+  with_items: "{{ ceilometer_apt_packages }}"
 
 - name: Install packages required in Developer Mode
   apt:
@@ -29,6 +29,6 @@
   until: install_packages|success
   retries: 5
   delay: 2
-  with_items: ceilometer_developer_mode_apt_packages
+  with_items: "{{ ceilometer_developer_mode_apt_packages }}"
   when:
     - ceilometer_developer_mode | bool

tasks/main.yml

@@ -28,7 +28,7 @@
   fail:
     msg: "Please set the {{ item }} variable prior to applying this role."
   when: (item is undefined) or (item is none)
-  with_items: ceilometer_required_secrets
+  with_items: "{{ ceilometer_required_secrets }}"
   tags:
     - always
 

tests/test.yml

@@ -131,7 +131,7 @@
       apt:
         name: "{{ item }}"
         state: present
-      with_items: packages_mongodb
+      with_items: "{{ packages_mongodb }}"
     - name: Configure the MongoDB bind address
       lineinfile:
         dest: /etc/mongodb.conf