Mute false alarm when installing docker

In install_docker.sh, we will restart docker service, then connect
to /var/run/docker.sock with retry mechanism.

At the first contacting with /var/run/docker.sock, when docker
service is not ready, it may complain some error.

Mute this false alarm.

Change-Id: If00a18d2e3ddee951662e272d47ae84215f16ad2
Closes-Bug: #1252087
Neutron: Define a utility function to add neutron service class

When enabling neutron service (i.e. enable_service q-xxx), related code
unconditionally adds a necessary plugin class to Q_SERVICE_PLUGIN_CLASSES.
Which may cause duplication in Q_SERVICE_PLUGIN_CLASSES when
Q_SERVICE_PLUGIN_CLASSES is explicitly specified in localrc.
As a result, neutron server fails to start.

This patch introduces a utility function to add service class,
and check duplication.

Closes-Bug: #1261291
Change-Id: Id2880c7647babfccc3e8d9fc60dd93c4b3997ed9
Correct glance db_sync command

Closes-Bug: #1263431

Change-Id: I30a53adfdd8e00a9995595af2e090190bac241a0
XenAPI: Fix bug with Xen ext4-using guests

Ubuntu saucy is using ext4, which means it hits a barrier
bug with certain versions of Xen, leading to a read only
filesystem.

This is bug https://bugs.launchpad.net/ubuntu/+source/linux/+bug/824089

Change-Id: I9a72b203d473dc555324d44ad7c240c80dccda15
Set default_network in tempest.conf

This is to support testing of change
Ia78582cac3790653c2281a5b63d953cd46d5c290 in Tempest.

Change-Id: Ibb812e2598fb11b7eef21a0868ee9baeea73186c
Change the libvirtd log level to DEBUG

Gate tests fail sometimes due to libvirt problems, but it is difficult
to investigate their reasons or workarounds because there is not any
log about libvirt.
This patch changes the log level of libvirtd to DEBUG for investigating
libvirt problems.

Change-Id: Ib6559ff978fa813d0332f2339d241dd3437196ee
Related-Bug: #1254872
Migrating trove to entry points

partially implements blueprint entrypoints-for-binscripts

Change-Id: Iaafde0ab7f27598d566fc008fba7eddc582139c9
Merge "Mute false alarm when installing docker"
Merge "Neutron: Define a utility function to add neutron service class"
Merge "Set default_network in tempest.conf"
Merge "Migrating trove to entry points"
Merge "Change the libvirtd log level to DEBUG"
Merge "Correct glance db_sync command"
Merge "XenAPI: Fix bug with Xen ext4-using guests"
Merge branch 'master' of git://github.com/openstack-dev/devstack into opendaylight