enhance logging for depend tracking mode

Add some extra log, to make the console output more understandable

Change-Id: If80cb9dba1031ad268bf9b6266ca83f93071a2ad
Switch the base URL to git.openstack.org

The git repositories on github for openstack are mirrors of the primary
repositories, which are hosted on git.openstack.org, so switch as much
as I can to using the primary, rather than the github mirror.

Change-Id: Idcfda49a691582055256b830c61e098f4a271339
Fix neutron log format with colorization

Closes-Bug: #1254817

Change-Id: I6de17ef15c18e2f8ab246934461a2b7c6ae4f95f
Merge "enhance logging for depend tracking mode"
Merge "Fix neutron log format with colorization"
Merge "Switch the base URL to git.openstack.org"
xenapi: enable user interaction with stack.sh

In XenServer, devstack runs inside a virtual machine. This makes it hard
for the user to interact with stack.sh should a parameter be missing.
This change will create an upstart job (devstack) that runs
stack.sh with console enabled so user can interact with it by running
vncviewer or using XenCenter.

Logging the output is also disabled, stamp files are used instead to
detect the script run status in case install_os_domU.sh is used.

As run.sh.log is removed, standard devstack logging should be used.

The change also removes the environment settings from run.sh, as they
are not needed, they should be specified in localrc. This way user
cannot get different experiences by using unstack.sh/stack.sh or run.sh

Also a proper unstack.sh is called instead of killing screen in run.sh

Change-Id: I7eb12bd74746cc7a1db3aa9fd68ece645a50001d
xenapi: display IP and DevStack result on console

The devstack setup service can update /etc/issue, displaying the status
of the installation and the VM's management IP. With this change, after
the devstack service finsihed, the login prompt will look like this:

OpenStack VM - Installed by DevStack
  Management IP:   10.219.3.108
  Devstack run:    SUCCEEDED

DevStackOSDomU login:

This helps people to log in to their system.

Change-Id: Idd6bbd5faf9ced5618cd3e95191bfc3b89473fa2