updated names and removed checks for rhel, as we already know we have systemd inside that play

roles/docker/tasks/systemd-proxies.yml

 ---
-- name: create docker service directory for RHEL family
+- name: create docker service directory for systemd
   file: path=/etc/systemd/system/docker.service.d state=directory
-  when: ansible_distribution in ["CentOS","RedHat"] and
-        ansible_distribution_major_version >= 7
 
-- name: drop docker environment for RHEL family
+- name: drop docker environment conf to enable proxy usage
   template:
     src: http-proxy.conf.j2
     dest: /etc/systemd/system/docker.service.d/http-proxy.conf
-  when: ansible_distribution in ["CentOS","RedHat"] and
-        ansible_distribution_major_version >= 7
-  register: rheldockerproxy
+  register: systemddockerproxy
 
-- name: reload systemctl daemons for RHEL family
+- name: reload systemctl daemons
   shell: systemctl daemon-reload
-  when: rheldockerproxy.changed
+  when: systemddockerproxy.changed
 
-- name: restart docker for RHEL family
+- name: restart docker so configs are applies
   service: name=docker state=restarted
-  when: rheldockerproxy.changed
+  when: systemddockerproxy.changed