feat(clean): add cleaning states

* libvirt/clean.sls: call all component cleaning state in a sensible
  order.

* libvirt/server/clean.sls: call all server subcomponent cleaning
  state in a sensible order. TLS certificates are not handle for now.

* libvirt/server/config/clean.sls: remove all configuration files.

* libvirt/server/package/clean.sls: remove the libvirt package. The
  dependencies are not managed.

* libvirt/server/service/clean.sls: disable and stop the service.

* libvirt/qemu/clean.sls: remove the qemu package. The dependencies
  are not managed.

* libvirt/extra/clean.sls: remove extra packages. The dependencies are
  not managed.

* libvirt/python/clean.sls: remove the libvirt python library if any.
  The dependencies are not managed.

libvirt/clean.sls

@@ -0,0 +1,8 @@
+# -*- coding: utf-8 -*-
+# vim: ft=sls
+
+include:
+  - .extra.clean
+  - .qemu.clean
+  - .server.clean
+  - .python.clean

libvirt/extra/clean.sls

@@ -0,0 +1,10 @@
+# -*- coding: utf-8 -*-
+# vim: ft=sls
+
+{#- Get the `tplroot` from `tpldir` #}
+{%- set tplroot = tpldir.split('/')[0] %}
+{%- from tplroot ~ "/map.jinja" import libvirt_settings with context %}
+
+libvirt-extra-clean-pkg-removed:
+  pkg.removed:
+    - pkgs: {{ libvirt_settings.extra_pkgs|json }}

libvirt/python/clean.sls

@@ -0,0 +1,16 @@
+# -*- coding: utf-8 -*-
+# vim: ft=sls
+
+{#- Get the `tplroot` from `tpldir` #}
+{%- set tplroot = tpldir.split('/')[0] %}
+{%- from tplroot ~ "/map.jinja" import libvirt_settings with context %}
+{%- from tplroot ~ "/python.jinja" import switch_python32 with context %}
+
+{%- set package = switch_python32(libvirt_settings.python3_pkg, libvirt_settings.python2_pkg) %}
+
+{#- Some OS do not have the python3 library #}
+{%- if package %}
+libvirt-python-clean-pkg-removed:
+  pkg.removed:
+    - name: {{ package }}
+{%- endif %}

libvirt/qemu/clean.sls

@@ -0,0 +1,10 @@
+# -*- coding: utf-8 -*-
+# vim: ft=sls
+
+{#- Get the `tplroot` from `tpldir` #}
+{%- set tplroot = tpldir.split('/')[0] %}
+{%- from tplroot ~ "/map.jinja" import libvirt_settings with context %}
+
+libvirt-qemu-clean-pkg-removed:
+  pkg.removed:
+    - name: {{ libvirt_settings.qemu_pkg }}

libvirt/server/clean.sls

@@ -0,0 +1,7 @@
+# -*- coding: utf-8 -*-
+# vim: ft=sls
+
+include:
+  - .service.clean
+  - .config.clean
+  - .package.clean

libvirt/server/config/clean.sls

@@ -0,0 +1,22 @@
+# -*- coding: utf-8 -*-
+# vim: ft=sls
+
+{#- Get the `tplroot` from `tpldir` #}
+{%- set tplroot = tpldir.split('/')[0] %}
+{%- set sls_server_service_clean = tplroot ~ '.server.service.clean' %}
+{%- from tplroot ~ "/map.jinja" import libvirt_settings with context %}
+
+include:
+  - {{ sls_server_service_clean }}
+
+libvirt-server-config-libvirtd-clean-file-absent:
+  file.absent:
+    - name: {{ libvirt_settings.libvirtd_config }}
+    - require:
+      - sls: {{ sls_server_service_clean }}
+
+libvirt-server-config-daemonconfig-clean-file-absent:
+  file.absent:
+    - name: {{ libvirt_settings.daemon_config_path }}/{{ libvirt_settings.libvirt_service }}
+    - require:
+      - sls: {{ sls_server_service_clean }}

libvirt/server/package/clean.sls

@@ -0,0 +1,16 @@
+# -*- coding: utf-8 -*-
+# vim: ft=sls
+
+{#- Get the `tplroot` from `tpldir` #}
+{%- set tplroot = tpldir.split('/')[0] %}
+{%- set sls_config_clean = tplroot ~ '.server.config.clean' %}
+{%- from tplroot ~ "/map.jinja" import libvirt_settings with context %}
+
+include:
+  - {{ sls_config_clean }}
+
+libvirt-server-package-clean-pkg-removed:
+  pkg.removed:
+    - name: {{ libvirt_settings.libvirt_pkg }}
+    - require:
+      - sls: {{ sls_config_clean }}

libvirt/server/service/clean.sls

@@ -0,0 +1,11 @@
+# -*- coding: utf-8 -*-
+# vim: ft=sls
+
+{#- Get the `tplroot` from `tpldir` #}
+{%- set tplroot = tpldir.split('/')[0] %}
+{%- from tplroot ~ "/map.jinja" import libvirt_settings with context %}
+
+libvirt-server-service-clean-service-dead:
+  service.dead:
+    - name: {{ libvirt_settings.libvirt_service }}
+    - enable: False