Refactor roles to support new variable schema

Add common-env and docker roles

roles/common_env/tasks/main.yml

@@ -0,0 +1,12 @@
+---
+- name: Set hostname
+  become: true
+  hostname:
+    name: "{{ ansible_host }}"
+
+- name: Install global bashrc
+  become: true
+  copy:
+    src: bashrc.sh
+    dest: /etc/profile.d/ZA-enpn-bashrc.sh
+    mode: 0644