api: Bump version to 5.

version 5 adds support for fallocate & discard.

Change-Id: Ifdc226953a25e4a4eb63e55d2a7c7ec77c397215
BUG: 953694
Signed-off-by: Vijay Bellur <vbellur@redhat.com>
Reviewed-on: http://review.gluster.org/5276
Reviewed-by: Bharata B Rao <bharata.rao@gmail.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
glusterd: Bump GD_MAX_OP_VERSION

Change-Id: I7a212435ce7e98fe01aad2c0d1f698de8ea84235
BUG: 981278
Signed-off-by: Kaushal M <kaushal@redhat.com>
Reviewed-on: http://review.gluster.org/5287
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
Merge branch 'master' of github.com:gluster/glusterfs
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