Unbundle all JavaScript libraries from Horizon

Remove all external JS libraries from Horizon, and pull them in as
xstatic packages instead.

Bootstrap, jquery-ui and jquery.bootstrap.wizard will be unbundled in separate
patches, as there are some problems adding them to global-requirements.

Partial-Implements: blueprint remove-javascript-bundling
Change-Id: Icbbcf8e58db2dcce96d187f7307201f728812cd2
Merge "Unbundle all JavaScript libraries from Horizon"