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
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
Ensure hostname resolves correctly

rabbitmq hangs on startup if the unqualified hostname for the
system doesn't resolve properly.  This change ensures that the
hostname is added to /etc/hosts so that will never happen with
devstack.

Change-Id: I2c250f38f9feb18d1a59f3a457c6d01c1d98499c
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 "Ensure hostname resolves correctly"