[meta] refactor kitchen tests (#765)

* [meta] refactor kitchen tests

This commit update kitchen tests to match important feature to test:
- default: test a deployment with all default values
- license: test a deployment with a license and default values
- trial: test a deployment with security enabled and trial license
- oss: test a deployment with oss version and default values (6.x only)
- upgrade: test an upgrade from a previous version
- oss-upgrade: test an upgrade with oss version (6.x only)
- oss-to-default-upgrade: test an upgrade from previous oss to latest
default version
- custom_config: test a deployment with custom config files
- security: test a deployment with security enabled

* [meta] fix license test

test/integration/oss.yml

@@ -1,5 +1,5 @@
 ---
-- name: Standard test for single node setup. Tests idempotence.
+- name: Setup Elasticsearch OSS 6.x
   hosts: localhost
   post_tasks:
     - include: elasticsearch/test/integration/debug.yml
@@ -7,11 +7,5 @@
     - elasticsearch
   vars:
     oss_version: true
-    es_heap_size: "1g"
-    es_plugins:
-      - plugin: ingest-attachment
-    es_config_default: "test/integration/files/custom_config/elasticsearch"
-    es_config_log4j2: "test/integration/files/custom_config/log4j2.properties"
-    es_config_jvm: "test/integration/files/custom_config/jvm.options"
 
 #Do not add tests here. This test is run twice and confirms idempotency.