Merge pull request #10 from kostyrev/master

Fix adding docker apt key on Ubuntu 14.04

.travis.yml

@@ -4,6 +4,7 @@ services: docker
 env:
   - distro: centos7
   - distro: ubuntu1604
+  - distro: ubuntu1404
   - distro: debian8
 
 script:

tasks/setup-Debian.yml

@@ -20,6 +20,12 @@
     url: https://download.docker.com/linux/ubuntu/gpg
     id: 9DC858229FC7DD38854AE2D88D81803C0EBFCD88
     state: present
+  register: add_repository_key
+  ignore_errors: true
+
+- name: Alternative | Add Docker apt key.
+  shell: "curl -sSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -"
+  when: add_repository_key|failed
 
 - name: Add Docker repository.
   apt_repository: