Remove the duplicated IScsiDxe driver from FDF; Add required shell libraries; Update SYSTEM_CONFIGURATION data structure. Test: Install and boot Windows 10. Cc: Zailiang Sun <zailiang.sun@intel.com> Cc: Yi Qian <yi.qian@intel.com> Cc: Michael Kinney <michael.d.kinney@intel.com> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: David Wei <david.wei@intel.com>