Add possibility to overwrite nginx public repo

For Centos, we use by default public repo for nginx. You can change this
behaviour with these role-wide variables:
- repo_centos_nginx_mirror
- repo_centos_nginx_key

Or with these osa-wide variables:
- centos_nginx_mirror
- centos_nginx_key

Change-Id: I8dcb3c97e9593877a4a420bd32b50ae29d9d311c

defaults/main.yml

@@ -27,6 +27,10 @@ cache_timeout: 600
 repo_centos_epel_mirror: "{{ centos_epel_mirror | default('http://download.fedoraproject.org/pub/epel') }}"
 repo_centos_epel_key: "{{ centos_epel_key | default('http://download.fedoraproject.org/pub/epel/RPM-GPG-KEY-EPEL-7') }}"
 
+## Centos NGINX repository options
+repo_centos_nginx_mirror: "{{ centos_nginx_mirror | default('http://nginx.org/packages/centos/7/$basearch/') }}"
+repo_centos_nginx_key: "{{ centos_nginx_key | default('http://nginx.org/keys/nginx_signing.key') }}"
+
 # Set the package install state for distribution and pip packages
 # Options are 'present' and 'latest'
 repo_server_package_state: "latest"

tasks/repo_install.yml

@@ -44,8 +44,8 @@
   yum_repository:
     name: nginx
     description: 'nginx repo'
-    baseurl: "{{ repo_nginx_repo }}"
-    gpgkey: "{{ repo_nginx_gpg_key }}"
+    baseurl: "{{ repo_centos_nginx_mirror }}"
+    gpgkey: "{{ repo_centos_nginx_key }}"
   when:
     - ansible_pkg_mgr in ['yum', 'dnf']
   register: add_nginx_repo

vars/redhat.yml

@@ -15,8 +15,6 @@
 
 systemd_utils_prefix: "/lib/systemd"
 
-repo_nginx_repo: http://nginx.org/packages/centos/7/$basearch/
-repo_nginx_gpg_key: http://nginx.org/keys/nginx_signing.key
 repo_nginx_pid: /run/nginx.pid
 
 git_daemon_path: /usr/libexec/git-core/git-daemon