[oozie] Simplify some dates when strptime() does not support %Z

Saw on a Python 2.6.6 RHEL 6.4. Might be related to daylight.
This appears to be platform specific.
HUE-2132 [search] Offer field sorting within the HTML widget

Re-use the gridlayout header sorting.
Minor issue is that the list can overflow now.
[search] Subscribe to facet limit change
HUE-2128 [search] Timeline dates are not loaded properly
HUE-2165 [search] syncFields() can corrupt the model

Field that does not exist anymore should be remove in bulk in both the
collection and template field list.
New fields can be added only to the list of selected fields.
HUE-2167 [search] Solr might not always return a document
HUE-2017 [search] Warning that highlightning only works if documents have and id field

Remove the result data when switching between layouts
Happens when dropping a new HTML or Grid result widget
HUE-2161 [oozie] Kill job popup in dashboard should disable the ok button

Manual feedback trigger for workflows, coordinators and bundles
HUE-2164 [core] Create retina favicon

Updated .ico and set it in the code
[core] Resource Manager RM HA

The [[yarn_clusters]] cluster configs in Hue ini need to be filled up with
at least 2 configs to configure Hue for RM HA.
submit_to must be True to have the RM taken into consideration.

The initial RM being used is the one named [[[default]]].
When submitting to Oozie, RM configs must specify the same logical_name.
When browsing JobBrowser, Job Browser will switch to the active RM on the fly if needed.
HUE-2157 [search] Update Gridlayout field list on search

Fixed for layout change case