add initial resolv_conf role; fixes for etc_hosts

roles/resolv_conf/tasks/main.yml

@@ -0,0 +1,15 @@
+---
+- name: Set resolv_conf_file if running in Docker
+  set_fact:
+    __resolv_conf_file: "{{ __resolv_conf_file_docker }}"
+  when: ansible_virtualization_type == "docker"
+
+
+- name: Deploy {{ __resolv_conf_file }}
+  template:
+    src: templates/resolv_conf.j2
+    dest: "{{ __resolv_conf_file }}"
+    mode: 0644
+
+
+...