control: Add net target increase action

Add the YAML based set_net_speed_increase action function as an action
class for JSON configs to use.

Change-Id: Ia7e5cb8bcdb4bba0ebf356d9dc774ab292f0e8fc
Signed-off-by: Matthew Barth <msbarth@us.ibm.com>
diff --git a/control/json/zone.hpp b/control/json/zone.hpp
index 8bf132c..2f6e925 100644
--- a/control/json/zone.hpp
+++ b/control/json/zone.hpp
@@ -136,6 +136,16 @@
     }
 
     /**
+     * @brief Get the target increase delta
+     *
+     * @return - The current target increase delta
+     */
+    inline auto& getIncDelta() const
+    {
+        return _incDelta;
+    };
+
+    /**
      * @brief Add a fan object to the zone
      *
      * @param[in] fan - Unique pointer to a fan object that will be moved into