Template /etc/environment rather than use lineinfile

The existing lineinfile implementation is buggy when changing and removing
entries from the global_environment_variables dict

Change-Id: Ic9899b1a4a72e72d0bac26eb8f650681186332e1
Partial-Bug: #1573131

tasks/openstack_proxy_settings.yml

@@ -14,10 +14,9 @@
 # limitations under the License.
 
 - name: Install host proxy settings
-  lineinfile:
-    dest: /etc/environment
-    state: present
-    line: "{% if item.value %}{{ item.key }}={{ item.value }}{% endif %}"
-  with_dict: global_environment_variables |default({})
+  template:
+    dest: "/etc/environment"
+    src: "environment.j2"
+    mode: "0644"
   tags:
     - openstack-host-proxies

templates/environment.j2

@@ -0,0 +1,10 @@
+# {{ ansible_managed }}
+
+PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games"
+{% if global_environment_variables %}
+{% for key, value in global_environment_variables.iteritems() %}
+{% if value %}
+{{ key }}={{ value }}
+{% endif %}
+{% endfor %}
+{% endif %}

tests/test.yml

@@ -27,7 +27,8 @@
       openstack_kernel_options:
         - { key: 'vm.swappiness', value: 5 }
       global_environment_variables:
-        PATH: "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games"
+        http_proxy: "http://someproxy.example.com"
+        https_proxy: "https://someproxy.example.com"
   post_tasks:
     - name: Open modules file
       slurp:
@@ -41,11 +42,16 @@
       slurp:
         src: /etc/hosts
       register: hosts_file
+    - name: Open /etc/environment file
+      slurp:
+        src: /etc/environment
+      register: environment_file
     - name: Read files
       set_fact:
         modules_content: "{{ modules_file.content | b64decode }}"
         sysctl_content: "{{ sysctl_file.content | b64decode }}"
         hosts_content: "{{ hosts_file.content | b64decode }}"
+        environment_content: "{{ environment_file.content | b64decode }}"
     - name: Check for release file
       stat:
         path: /etc/openstack-release
@@ -54,10 +60,6 @@
       stat:
         path: /etc/default/sysstat
       register: systat_file
-    - name: Check for environment file
-      stat:
-        path: /etc/environment
-      register: environment_file
     - name: Check for ssh dir
       stat:
         path: "{{ ansible_env.HOME}}/.ssh"
@@ -71,5 +73,7 @@
           - "'127.111.111.102 test2' in hosts_content"
           - "release_file.stat.exists"
           - "systat_file.stat.exists"
-          - "environment_file.stat.exists"
+          - "'/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games' in environment_content"
+          - "'http_proxy=http://someproxy.example.com' in environment_content"
+          - "'https_proxy=https://someproxy.example.com' in environment_content"
           - "ssh_dir.stat.isdir"