roles/koji-builder: Deploy the Koji builder

The *koji-builder* role installs and configures the Koji builder
(*kojid*). It supports configuring an HTTP proxy, if required.

roles/koji-builder/defaults/main.yml

@@ -0,0 +1,13 @@
+koji_home: /var/lib/koji
+koji_temp: /var/tmp/koji
+kojihub_host: "{{ ansible_fqdn }}"
+kojihub_url: https://{{ kojihub_host }}/kojihub
+kojifiles_host: "{{ kojihub_host }}"
+kojifiles_url: http://{{ kojifiles_host }}/kojifiles
+kojid_maxjobs: 10
+kojid_minspace: 4096
+kojid_allowed_scms: []
+koji_smtp_relay:
+http_proxy: ''
+https_proxy: ''
+no_proxy: ''