Use DevStack's plugin model to allow for developers to easily set up
the Watcher services within DevStack.
Provides documentation on how to use the plugin as well as documentation
on how to configure a multi-node DevStack installation to use. Also
provides an example local.conf for both the controller and compute
nodes.
Implements blueprint devstack-plugin
Change-Id: Ide663813f7a49d645877a21a0d1914be3218385e