[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/helpers/serverspec/oss_spec.rb

@@ -1,20 +0,0 @@
-require 'spec_helper'
-require 'shared_spec'
-
-shared_examples 'oss::init' do |vars|
-  describe file("/etc/elasticsearch/log4j2.properties") do
-    it { should be_file }
-    it { should be_owned_by 'root' }
-    it { should contain 'Log4j CUSTOM FILE' }
-  end
-  describe file("/etc/elasticsearch/jvm.options") do
-    it { should be_file }
-    it { should be_owned_by 'root' }
-    it { should contain 'JVM configuration CUSTOM FILE' }
-  end
-  describe file($family['defaults_path']) do
-    it { should be_file }
-    it { should be_owned_by 'root' }
-    it { should contain 'Elasticsearch CUSTOM FILE' }
-  end
-end