UI is cached between Fuel versions

[Vitaly Kramskikh]

It leads to situation where older version of the UI tries to use newer version of nailgun, and it leads to strange behaviour. It only happens on compressed UI as uncompressed version consists of many files and each of them is loaded with "_" argument containing current time and this busts the cache. To achieve the same functionality for compressed UI the following actions can be done:
1) Load main.js with cache-busting argument depdending on the release. For example, it should be commit SHA and it should be added when UI/ISO is being built
2) nginx static dir should be configured properly
It is also important to be sure that any changes won't make main.js to load every time the user opens the fuel UI.

[OpenStack Infra (hudson-openstack)]

Related fix proposed to branch: master
Review: https://review.openstack.org/98781

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/98781
Committed: https://git.openstack.org/cgit/stackforge/fuel-web/commit/?id=8815b2c7b46dda82b2794e99ab5b456fcb8918ee
Submitter: Jenkins
Branch: master

commit 8815b2c7b46dda82b2794e99ab5b456fcb8918ee
Author: Vitaly Kramskikh <email address hidden>
Date: Mon Jun 9 17:10:01 2014 +0400

    Bust cache for main.js for compressed UI

    Change-Id: I665da4c1d2a7eb7803f006e7fe5c8b81d31f810e
    Related-Bug: #1325012