Add api scheme based on http_ssl variable

defaults/main.yml

@@ -35,8 +35,10 @@ es_allow_downgrades: false
 es_xpack_features: []
 #These are used for internal operations performed by ansible.
 #They do not affect the current configuration
+es_api_scheme: "http"
 es_api_host: "localhost"
 es_api_port: 9200
+es_api_uri: "{{es_api_scheme}}://{{es_api_host}}:{{es_api_port}}"
 es_debian_startup_timeout: 10
 
 # JVM custom parameters