Add Koschei stg/prod hosts

- koschei-specific setup tasks are moved to a new koschei role
- cloud dev instance is made to use koschei role
- stg and prod instances are added to inventory
- koschei host group is introduced

handlers/restart_services.yml

@@ -47,6 +47,18 @@
 - name: restart kojid
   action: service name=kojid state=restarted
 
+- name: restart koschei-polling
+  action: service name=koschei-polling state=restarted
+
+- name: restart koschei-resolver
+  action: service name=koschei-resolver state=restarted
+
+- name: restart koschei-scheduler
+  action: service name=koschei-scheduler state=restarted
+
+- name: restart koschei-watcher
+  action: service name=koschei-watcher state=restarted
+
 - name: restart libvirtd
   action: service name=libvirtd state=restarted