Sharable links include all sorts of extra unused params

[Matthew Treinish]

When navigating between pages on openstack-health the params you set on previous pages are sticky in the url and transfer between consecutive view. In other words if you set a groupkey param on the home page but then change to the second page view or the tests page the groupkey parameter is still in the url and it doesn't mean anything except on the first page. When you jump around between a couple of pages the urls can get kinda lengthy for no reason.

[Tim Buckley (timothy-jas-buckley)]

There's a couple things we can do to clean this up:
 - Controllers should listen for $destroy events and remove any page-specific parameters like 'search', 'limit', 'offset', etc (this is an issue for tests detail pagination)
 - Parameters at their default values shouldn't be shown in the URL at all (e.g. resolutionKey=hour, groupKey=project, etc should only be included if explicitly changed). The 'end' parameter could probably also be left out though after a period of time it would stop showing the same data.

I'll look into implementing these.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/308750

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/308750
Committed: https://git.openstack.org/cgit/openstack/openstack-health/commit/?id=9bb57ab0b452b675adc1c866b32fcb0382ee996e
Submitter: Jenkins
Branch: master

commit 9bb57ab0b452b675adc1c866b32fcb0382ee996e
Author: Tim Buckley <email address hidden>
Date: Wed Apr 20 23:00:47 2016 -0600

    Only add parameters to the URL when changed from defaults

    Currently, page state parameters like 'end', 'resolutionKey', and
    'groupKey' are sync'd to the page URL on every page change
    unconditionally. This results in a lot of unnecessary information that
    we can assume by default until a user actually requests a different
    value.

    This patch modifies the current parameter sync implementation so that
    it only maintains page parameters after their initial values have been
    explicitly set by a user, and assumes default values otherwise. In
    most cases, this should significantly shorten shared URL length.

    Change-Id: Ife271444817bdfa8d19c0b69ca6039c5c7c290db
    Closes-Bug: #1572766