gfid-access: virtual access to filesystem through gfid path

BUG: 952029
Change-Id: I7405d473d369a4a951836eceda4faccbad19ce0e
Signed-off-by: Amar Tumballi <amarts@redhat.com>
Reviewed-on: http://review.gluster.org/5497
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>