Add shutdown method

Author: Teddy Reed

osquery/extension_manager.py

@@ -8,6 +8,8 @@
 from __future__ import print_function
 from __future__ import unicode_literals
 
+import sys
+
 from osquery.extensions.Extension import Iface
 from osquery.extensions.ttypes import ExtensionResponse, ExtensionStatus
 from osquery.singleton import Singleton
@@ -60,6 +62,10 @@ def add_plugin(self, plugin):
         if obj.name() not in self._plugins[obj.registry_name()]:
             self._plugins[obj.registry_name()][obj.name()] = obj
 
+    def shutdown(self):
+        """The osquery extension manager requested a shutdown"""
+        sys.exit(0)
+
     def registry(self):
         """Accessor for the internal _registry member variable"""
         return self._registry