Port upstream 5 patches for changing extra isize as below:

commit d0141191a20289f8955c1e03dad08e42e6f71ca9
	"ext4: fix xattr shifting when expanding inodes"
commit 418c12d08dc64a45107c467ec1ba29b5e69b0715
	"ext4: fix xattr shifting when expanding inodes part 2"
commit 443a8c41cd49de66a3fda45b32b9860ea0292b84
	"ext4: properly align shifted xattrs when expanding inodes"
commit e3014d14a81edde488d9a6758eea8afc41752d2d
	"ext4: fixup free space calculations when expanding inodes"
commit 94405713889d4a9d341b4ad92956e4e2ec8ec2c2
	"ext4: replace bogus assertion in ext4_xattr_shift_entries()"

Signed-off-by: Yang Sheng <yang.sheng@intel.com>
Change-Id: I01414bcc91d8f57ca72281916d35536d3926e570
Reviewed-on: https://review.whamcloud.com/27045


Tested-by: Jenkins
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Wang Shilong <wshilong@ddn.com>
Reviewed-by: Fan Yong <fan.yong@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>