Add ansible provisioning (#122)

* first ansible skeleton

* first commit of ansible installation of vulnwhisperer outside docker

* first ansible skeleton

* first commit of ansible installation of vulnwhisperer outside docker

* refactor the ansible role a bit

* update readme, add fail validation step to provision.yml and fix
typo when calling a logging funciton

ansible/roles/elastic.elasticsearch/tasks/elasticsearch-optional-user.yml

@@ -0,0 +1,24 @@
+---
+#Add the elasticsearch user before installing from packages.
+- name: Ensure optional elasticsearch group is created with the correct id.
+  become: yes
+  #Restart if these change
+  notify: restart elasticsearch
+  group:
+    state: present
+    name: "{{ es_group }}"
+    system: yes
+    gid: "{{ es_group_id }}"
+
+- name: Ensure optional elasticsearch user is created with the correct id.
+  become: yes
+  #Restart if these change
+  notify: restart elasticsearch
+  user:
+    state: present
+    name: "{{ es_user }}"
+    comment: elasticsearch system user
+    system: yes
+    createhome: no
+    uid: "{{ es_user_id }}"
+    group: "{{ es_group }}"