Call commandhandler from commandcontroller actions

The CommandController now implements the calls to the specific
command methods and sends commands to the icinga process

refs #4441

library/Icinga/Protocol/Commandpipe/PropertyModifier.php

@@ -91,7 +91,6 @@ class PropertyModifier
         self::PASSIVE => self::STATE_KEEP,
         self::NOTIFICATIONS => self::STATE_KEEP,
         self::FRESHNESS => self::STATE_KEEP,
-        self::OBSESSING => self::STATE_KEEP,
         self::EVENTHANDLER => self::STATE_KEEP
     );