run terrain estimator after control fusion modes. Otherwise _range_data_ready will never be true and fuseHagl() will never run

EKF/ekf.cpp

@@ -127,12 +127,12 @@ bool Ekf::update()
 		predictState();
 		predictCovariance();
 
-		// run a separate filter for terrain estimation
-		runTerrainEstimator();
-
 		// control fusion of observation data
 		controlFusionModes();
 
+		// run a separate filter for terrain estimation
+		runTerrainEstimator();
+
 	}
 
 	// the output observer always runs