HUE-1917 [oozie] Crontab support in dashboard

Extended jqCron to support readonly too
Added jqCron to coordinator list and coordinator details
HUE-2149 [search] More facets are displayed when limit is small

Fixed display bug
HUE-2157 [search] Gridlayout field list min height could match number of rows

Added height change when the rows space is bigger than the list
HUE-2148 [search] Download query can be missing some columns
HUE-2143 [beeswax] MR job links are not always displayed

Job Browser understands either job_XXX or application_XXX.
[spark] Is empty result should work with any type of data
HUE-2137 [indexer] Support core creation in non Solr cloud mode

Managing instance directories under CORE_INSTANCE_DIR configured path.
Only local solr instances allowed. Will not work with other instances.
Seems to be a bug in solr for unloading a core.
[core] Fix LDAP tests