HUE-1997 [core] Long dropdown menu items go outside the menu area

Added padding
HUE-1998 [search] Improve demo collection message display

Removed jumpiness and updated link
HUE-1999 [beeswax] Update multi query separation algorithm

Updated according to the py counterpart
Updated code style
[metastore] Ensure database exists before creating a table
HUE-1973 [core] django-openid-auth mysql issue

Change django-auth-ldap model.
There are no migrations, so this may break some upgrade paths.
[hbase] Use absolute root path for pointing to the example data
[beeswax] Install Hive and Impala sample on a non local host

Manage Impala uploads in case impersonation if off.
HUE-2002 [search] Do not break the editor when bad field value or name