[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/license.yml

@@ -0,0 +1,57 @@
+---
+- name: Elasticsearch Xpack HTTP different keystore and truststore with password
+  hosts: localhost
+  post_tasks:
+    - include: elasticsearch/test/integration/debug.yml
+  roles:
+    - elasticsearch
+  vars:
+    es_config_6x:
+      xpack.security.authc.realms.file1.order: 0
+      xpack.security.authc.realms.file1.type: file
+    es_config_7x:
+      xpack.security.authc.realms.file.file1.order: 0
+    es_config: "{{ es_config_7x if es_major_version == '7.x' else es_config_6x }}"
+    es_xpack_license: "{{ lookup('file', '/tmp/license.json')  }}"
+    es_api_basic_auth_username: elastic
+    es_api_basic_auth_password: changeme
+    es_api_sleep: 5
+    es_enable_http_ssl: true
+    es_enable_transport_ssl: true
+    es_ssl_keystore: "test/integration/files/certs/keystore-password.p12"
+    es_ssl_truststore: "test/integration/files/certs/truststore-password.p12"
+    es_ssl_keystore_password: password1
+    es_ssl_truststore_password: password2
+    es_validate_certs: no
+    es_users:
+      file:
+        es_admin:
+          password: changeMe
+          roles:
+            - admin
+        testUser:
+          password: changeMeAlso!
+          roles:
+            - power_user
+            - user
+    es_roles:
+      file:
+        admin:
+          cluster:
+            - all
+          indices:
+            - names: '*'
+              privileges:
+                - all
+        power_user:
+          cluster:
+            - monitor
+          indices:
+            - names: '*'
+              privileges:
+                - all
+        user:
+          indices:
+            - names: '*'
+              privileges:
+                - read