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-RedHat-version-lock.yml

@@ -0,0 +1,7 @@
+---
+- name: RedHat - install yum-version-lock
+  become: yes
+  yum: name=yum-plugin-versionlock state=present update_cache=yes
+- name: RedHat - lock elasticsearch version
+  become: yes
+  shell: yum versionlock delete 0:elasticsearch* ; yum versionlock add {{ es_package_name }}{% if es_version is defined and es_version != "" %}-{{ es_version }}{% endif %}