Removed tf2_ros namespace from standard includes header

Author: Jayasinghe, Oshada (Data61, Pullenvale)

include/syropod_highlevel_controller/standard_includes.h

@@ -61,7 +61,6 @@
 
 using namespace std;
 using namespace ros;
-using namespace tf2_ros;
 
 /// Converts Degrees to Radians.
 /// @param[in] degrees Value in degrees to be converted to radians

src/state_controller.cpp

@@ -24,7 +24,7 @@ StateController::StateController(void)
   model_->generate();
 
   debug_visualiser_.setTimeDelta(params_.time_delta.data);
-  transform_listener_ = allocate_shared<TransformListener>(Eigen::aligned_allocator<TransformListener>(), transform_buffer_);
+  transform_listener_ = allocate_shared<tf2_ros::TransformListener>(Eigen::aligned_allocator<tf2_ros::TransformListener>(), transform_buffer_);
 
   // Hexapod Remote topic subscriptions
   system_state_subscriber_            = n.subscribe("syropod_remote/system_state", 1,