Following APIs glfs_h_lease(), glfs_lease() added, so that gfapi applications can set and get lease which enables more efficient client side caching. Updates: #350 Change-Id: Iede85be9af1d4df969b890d0937ed0afa4ca6596 Signed-off-by: Poornima G <pgurusid@redhat.com> Signed-off-by: Soumya Koduri <skoduri@redhat.com> Signed-off-by: Jiffin Tony Thottan <jthottan@redhat.com>