control: Add getBus() and getGroups() functions for triggers

Event triggers will need to retrieve the sdbusplus bus object and each
actions set of groups when being created.

Change-Id: I7309ebbae6fb0c0df98f5dfaa89c9063b0d97719
Signed-off-by: Matthew Barth <msbarth@us.ibm.com>
diff --git a/control/json/manager.hpp b/control/json/manager.hpp
index 420551e..2ca2687 100644
--- a/control/json/manager.hpp
+++ b/control/json/manager.hpp
@@ -263,6 +263,14 @@
     void timerExpired(TimerData& data);
 
     /**
+     * @brief Get the sdbusplus bus object
+     */
+    inline auto& getBus()
+    {
+        return _bus;
+    }
+
+    /**
      * @brief Get the configured power on delay(OPTIONAL)
      *
      * @return Power on delay in seconds