LU-6245 tests: remove libcfs.h from lctl code

LU-6245 tests: remove libcfs.h from lctl code

Since user land libcfs is mostly gone libcfs.h can be
removed from the code that is used by lctl.

Change-Id: Ieb2f3873177dfc2c7fa3036568e263f4ba27e1ce
Signed-off-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-on: http://review.whamcloud.com/15208
Reviewed-by: frank zago <fzago@cray.com>
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>