hal_hw_interface: Don't hide GenericHWInterface init function

This renames init to init_hal to better describe what it does. This
should be safe to do because init_hal is called explicitly (not via
virtual dispatch).

hal_hw_interface/include/hal_hw_interface/hal_hw_interface.h

@@ -97,7 +97,7 @@ class HalHWInterface : public ros_control_boilerplate::GenericHWInterface
    */
   //* \todo Give this an int return value for reporting failure
   //* \todo Make the `reset` pin an IO pin
-  void init(void (*funct)(void*, long));
+  void init_hal(void (*funct)(void*, long));
 
   /**
    * \brief Create float-type HAL pins for each joint

hal_hw_interface/src/hal_control_loop.cpp

@@ -74,7 +74,7 @@ HalRosControlLoop::HalRosControlLoop() : node_is_shutdown(0)
                    CNAME);
 
   // Init HAL hardware interface
-  hardware_interface_->init(&funct);
+  hardware_interface_->init_hal(&funct);
 
   HAL_ROS_LOG_INFO(CNAME, "%s: Done initializing HAL hardware interface",
                    CNAME);

hal_hw_interface/src/hal_hw_interface.cpp

@@ -39,7 +39,7 @@ HalHWInterface::HalHWInterface(ros::NodeHandle& nh, urdf::Model* urdf_model)
 {
 }
 
-void HalHWInterface::init(void (*funct)(void*, long))
+void HalHWInterface::init_hal(void (*funct)(void*, long))
 {
   HAL_ROS_LOG_INFO(CNAME, "%s: Initializing HAL hardware interface", CNAME);