libs: update nfs4j to 0.7.0

fixes compatibility with rhel7 and linux kernels > 3.11
provides functionality required by proxy IO

Changelog for nfs4j-0.6.3..nfs4j-0.7.0
    * [ffcf8a9] vfs: update API interface to match new changes in chimera
    * [3252e04] nfsv3: fix creation of symbolic link
    * [f3a8db4] nfsv3: fix hard link creation (similar to http://rb.dcache.org/r
    * [a3642de] src: keep style check happy
    * [89346e7] nfsv4: remove dead code
    * [6e7cd2a] vfs: chimera: avoid extra db lookup
    * [cc22d5c] test: do not use obsolete ip host name
    * [5958f97] nfsv4: add state dispose listener
    * [1e946d2] core: implement missing SECINFO_NO_NAME
    * [03201b8] pom: update liquibase-core to 3.0.8

Acked-by: Gerd Behrmann
Target: master, 2.7, 2.6
Require-book: no
Require-notes: no
(cherry picked from commit 3f0703b5fc3b1ab39a6ede4d125eb9960ae1c41a)
Signed-off-by: Tigran Mkrtchyan <tigran.mkrtchyan@desy.de>
nfs4: implement proxy-io on read

Linux client too often falls back to IO through MDS (door).
This ends up with IO error on the client side as dCache does
not supports it.

This change set aims to add proxy IO by using internally DCAP
protocol. The door-pool communication can be changed later to
other protocol.

This is for master, nevertheless, 2.7 and 2.6 should have it as well.

Acked-by: Gerd Behrmann
Target: master
Require-book: no
Require-notes: no
(cherry picked from commit 93ec46a3a1be602c0e47d54abd8b0cb12ebb730f)
Signed-off-by: Tigran Mkrtchyan <tigran.mkrtchyan@desy.de>
Merge pull request #370 from kofemann/2.7-backport

2.7 backport