HUE-2379-[fb] Right click clears the selection

Removed logic that deselects items on context click to allow for batch editing of items
HUE-2381 [fb] Right click menu is not always hidden when clicking outside

Added event handler to determine if context click occurs outside of file list in order to close the context menu
HUE-2380 [fb] right click contextual menu within the trash should provide according operations

Added menu items (restore, empty trash) to be displayed from trash directory
[pig] Do not ship piggybank anymore
HUE-2382 [core] Typo in hadoop config_validator
HUE-2383 [filebrowser] Close file handle in read_contents properly
[hue] users retain their superuser status when logging in with AllowAllBackend
HUE-2384 [fb] Send to trash root when deleting trash

Updated redirect URL: after emptying trash, users are redirected to trash root directory
Added home directory to view model
[indexer] Remove reference to SOLR_HOME