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-Debian-version-lock.yml

@@ -0,0 +1,6 @@
+---
+- name: Debian - hold elasticsearch version
+  become: yes
+  command: "apt-mark hold {{ es_package_name }}"
+  register: hold_elasticsearch_result
+  changed_when: "hold_elasticsearch_result.stdout != '{{ es_package_name }} was already set on hold.'"