add service management support

Change-Id: Iffb55fee41b8398de12554b58a9d36ae2b81e7ff

README.rst

               printf "This is [company name] network.\n"
               printf "Unauthorized access strictly prohibited.\n"
 
+Services
+~~~~~~~~
+
+Stop and disable linux service:
+
+.. code-block:: yaml
+
+    linux:
+      system:
+        service:
+          apt-daily.timer:
+            status: dead
+
+Possible status is dead (disable service by default), running (enable service by default), enabled, disabled.
+
 RHEL / CentOS
 ^^^^^^^^^^^^^
 

linux/system/init.sls

 {%- if system.netconsole is defined %}
 - linux.system.netconsole
 {%- endif %}
+{%- if system.service is defined %}
+- linux.system.service
+{%- endif %}

linux/system/service.sls

+{%- from "linux/map.jinja" import system with context %}
+{%- if system.enabled %}
+
+{%- for name, service in system.service.iteritems() %}
+
+linux_service_{{ name }}:
+  service.{{ service.status }}:
+  {%- if service.status == 'dead' %}
+  - enable: {{ service.get('enabled', False) }}
+  {%- elif service.status == 'running' %}
+  - enable: {{ service.get('enabled', True) }}
+  {%- endif %}
+  - name: {{ name }}
+
+{%- endfor %}
+{%- endif %}