Deleted data using HTTP API should be saved to the trash

Incompatible change: Webhdfs and httpfs DELETE API's default behaviour is going to be similar to Delete shell command. If config "fs.trash.interval" is set to value greater than 0, DELETE API will by-default try to move given file to .Trash dir (similar to Delete shell command's behaviour). However, DELETE API will also have skiptrash query param available that can skip trash even if config "fs.trash.interval" is set to value greater than 0 (similar to skipTrash argument of Delete shell command). Default value of skiptrash query param will be false. API change: curl -i -X DELETE " http://host:port/webhdfs/v1/path?op=DELETE [&recursive=true|false][&skiptrash=true|false]"