Fixing some yaml-lint warnings

Scope of this commit is to fix warnings reported by
offline-installer-master-yaml-lint jenkins job

Change-Id: Id858a37ce35d53ad1ffd5e5797607faae484ed15
Issue-ID: OOM-1753
Signed-off-by: Michal Ptacek <m.ptacek@partner.samsung.com>
diff --git a/ansible/roles/application-install/tasks/install.yml b/ansible/roles/application-install/tasks/install.yml
index d2134d3..96f66b9 100644
--- a/ansible/roles/application-install/tasks/install.yml
+++ b/ansible/roles/application-install/tasks/install.yml
@@ -4,6 +4,7 @@
      {{ helm_bin_dir }}/helm init
      --upgrade
      --skip-refresh
+  changed_when: true # init is always changed type of action
 
 #A correct way to implement this would be using --wait option in helm init invocation.
 #However, it does not work due to https://github.com/helm/helm/issues/4031 (fixed in newer helm release)
@@ -13,22 +14,37 @@
   until: result.rc == 0
   delay: 10
   retries: 12
+  changed_when: false # for idempotency
 
 - name: Get all helm repos
   command: "{{ helm_bin_dir }}/helm repo list"
   register: repos
+  changed_when: false # for idempotency
 
 - name: Remove stable repo
   command: "{{ helm_bin_dir }}/helm repo remove stable"
+  changed_when: true # when executed its a changed type of action
   when: "'stable' in repos.stdout"
 
 - name: Helm Serve
   shell: "{{ helm_bin_dir }}/helm serve &"
   async: 45
-  poll: 0
+  poll: 3 # wait 3sec to get a chance for some stderr
+  register: helm_serve
+  changed_when: "'address already in use' not in helm_serve.stderr"
+
+- name: List helm repos
+  command: "{{ helm_bin_dir }}/helm repo list"
+  register: helm_repo_list
+  changed_when: false # for idempotency
+  failed_when:
+    - helm_repo_list.rc > 0
+    - "'Error: no repositories to show' not in helm_repo_list.stderr"
 
 - name: Helm Add Repo
   command: "{{ helm_bin_dir }}/helm repo add {{ helm_repository_name }} {{ helm_repository_url }}"
+  when: "'local' not in helm_repo_list.stdout"
+  changed_when: true # when executed its a changed type of action
 
 - name: Build local helm repository
   make:
@@ -47,7 +63,7 @@
 # WA: this is required because deploy plugin dont process params properly
 - name: Create override file with global.cacert
   copy:
-    dest: "{{ app_data_path}}/override.yaml"
+    dest: "{{ app_data_path }}/override.yaml"
     content: |
       global:
         cacert: |
@@ -66,3 +82,4 @@
           {{ helm_repository_name }}/{{ app_helm_chart_name }}
           --namespace {{ app_kubernetes_namespace }}
           -f {{ app_data_path }}/override.yaml
+  changed_when: true # when executed its a changed type of action