Add vars and conditionals to control certs generation and installation

roles/opendistro/opendistro-elasticsearch/defaults/main.yml

@@ -66,3 +66,7 @@ elasticrepo:
 
 opendistro_admin_password: changeme
 opendistro_kibana_password: changeme
+
+# Deployment settings
+generate_certs: true
+perform_installation: true

roles/opendistro/opendistro-elasticsearch/tasks/main.yml

@@ -1,10 +1,15 @@
 ---
 
 - import_tasks: local_actions.yml
+  when:
+    - generate_certs == true
+
+- block:
 
   - import_tasks: RedHat.yml
     when: ansible_os_family == 'RedHat'
 
+
   - name: Install OpenDistro
     package:
       name: opendistroforelasticsearch-{{ opendistro_version }}
@@ -85,3 +90,5 @@
 
   - import_tasks: "RMRedHat.yml"
     when: ansible_os_family == "RedHat"
+
+  when: perform_installation == true