Fix race between dispatchers.run and toDisk

Signed-off-by: Alexandr Morozov <lk4d4math@gmail.com>
Changes to Sven's cherry pick process
Added content and revised after walk-through

Docker-DCO-1.1-Signed-off-by: Fred Lifton <fred.lifton@docker.com> (github: fredlf)
Update Travis to also run the test suite

Signed-off-by: Andrew Page <admwiggin@gmail.com>
Merge pull request #7890 from fredlf/docs-cherry-pick-update-process

Changes to Sven's cherry pick process
Merge pull request #7883 from LK4D4/fix_build_race

Fix race between dispatchers.run and toDisk
Use a local copy of jquery so that the docs work in China, and offline too.

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@docker.com> (github: SvenDowideit)
Merge pull request #7894 from SvenDowideit/use-local-jquery

Use a local copy of jquery so that the docs work in China, and offline too.
Merge pull request #7893 from tianon/travis-run-tests

Update Travis to also run the test suite
added a css fix for the image bug issue

Docker-DCO-1.1-Signed-off-by: Nathan Hsieh <hsieh.nathan@gmail.com>
(github: nhsiehgit)
Merge pull request #7908 from nhsiehgit/issue363imgfix

added a css fix for the image bug issue
devmapper: use 'user_xattr' as mountoption for ext4 - fixes #6189

># docker pull centos
># docker run -i -t centos /bin/bash

~~~
bash-4.1# touch file
bash-4.1# setfattr -n user.attr -v 1 file
setfattr: file: Operation not permitted
~~~

With 'user_xattr' as mount option

~~~
bash-4.1# touch file
bash-4.1# setfattr -n user.attr -v 1 file
bash-4.1# getfattr -d -m. file
>#file: file
user.xattr="1"
~~~

Signed-off-by: Harshavardhana <fharshav@redhat.com>
bring in image layer user xattr support - fixes #6189

Signed-off-by: Harshavardhana <fharshav@redhat.com>
handle ERANGE properly Lgetxattr() - fixes #6189

Signed-off-by: Harshavardhana <fharshav@redhat.com>
Update libcontainer related to xattrs - fixes #6189

 - provide Llistxattr to be used inside libcontainer
 - fix ERANGE handling properly for long xattrs

Signed-off-by: Harshavardhana <fharshav@redhat.com>