Removing devicePath member from dev struct

Removing devicePath member from dev struct

I realized that I inadvertently added a member to the def struct to
contain each device's sysfs path when there was an existing member in the
dev struct for "OS specific path to device metadat, eg sysfs"  Since the
udev backend needs to record the sysfs path while it's in the process of
creating the device, before the dev struct gets allocated, I chose to
remove the member from the dev struct.

* src/conf/node_device_conf.c src/conf/node_device_conf.h
  src/node_device/node_device_driver.c src/node_device/node_device_hal.c
  src/node_device/node_device_udev.c: remove devicePath from the
  structure and use def->sysfs_path instead