[jb] Sort jobs by date by default instead of job ids

Show newest jobs first independently of their names.
Will work with Impala, Spark on YARN that way too.
[search] Download first 1000 rows of a query

Currently only download the current page.
We can see later for enabling more rows to be downloaded.
[beeswax] Integrate hive-site.xml into the Hive commands

export HIVE_CONF_DIR="/var/run/cloudera-scm-agent/process/`ls -alrt /var/run/cloudera-scm-agent/process | grep HUE | tail -1 | awk '{print $9}'`/hive-conf"

./build/env/bin/hue close_sessions 0
Closing (all=False) HiveServer2/Impala sessions older than 0 days...
Error: TCloseSessionResp(status=TStatus(errorCode=None, errorMessage=None, sqlState=None, infoMessages=None, statusCode=0))
1 sessions closed.

./build/env/bin/hue close_queries 0
Closing (all=False) HiveServer2/Impala queries older than 0 days...
/var/run/cloudera-scm-agent/process/588-hue-HUE_SERVER/hive-conf
0 queries closed.
[beeswax] Rename error to info
[beeswax] Close Beeswax queries
[beeswax] Close query for any type of queries
[beeswax] Cleared all old references to Beeswax daemon
[impala] Close queries commands cannot work for Impala

For technical reasons, Impala connections happens at the network level
so for closing them we should run the command from a view on the
webserver.
HUE-2126 [search] Beautify limit, range, zoom out, etc. of widgets

Removed buttons and added labels for range and sort
Fixed size problems for small column widgets
Unified Zoom out
[jb] Also show jobs according to acl modify permissions

e.g.
set mapreduce.job.acl-modify-job=UserA; : kill job
[jb] Also show jobs according to acl view permissions

e.g.
set mapreduce.job.acl-view-job=UserA;

Note: this only work when going directly to the single job page:
The job will still not appear on the main list of jobs (MR1/MR2
APIs do not allow a batch check of the acl permissions).
[jb] Basic test with mocking for view and modify acl and MR1
[core] Add note about threaded option and Oracle databases
[useradmin] LDAP DNs should accept spaces

1. When a DN is being provided, it may have spaces. The corresponding username retrieved from LDAP should not have spaces nor colons.
2. When a username is provided, it should not have spaces nor colons.
3. Group names can have any character apparently.
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