Add barebones MySQL role

Which we are going to immediately flesh out

roles/mysql/files/ansiblekey

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+../../ansiblehost/files/ansiblekey

roles/mysql/meta/main.yml

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+---
+allow_duplicates: no

roles/mysql/tasks/main.yml

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+#!/usr/bin/ansible-playbook
+# vim:ft=ansible:
+---
+- name: Set up MySQL
+  block:
+  - name: Install MySQL
+    apt:
+      name: "{{ packages }}"
+    vars:
+      packages:
+      - mariadb-server
+      - python-mysqldb
+  - name: Start MySQL
+    service:
+      name: mysql
+      state: started
+      enabled: true
+  become: true