YADE should compress the source or target file when operation=zip is used

As of now situation

1. when YADE is configured with operation = zip, YADE fallback on the copy operation.

Expected

1. when YADE is configured with operation = zip, YADE should compress the files on source server

How to reproduce

1. Profile with {{operation = zip }}

   [sos@galadriel config]$ pwd
   /home/sos/sos-berlin.com/jade_client/config
   [sos@galadriel config]$ more 7200_jade_settings_zip_operation.ini
   [zip_wilma_to__Galadriel]
   file_spec              = ^.*_09.03.2015\.xls$
   operation              = zip
   verbose                = 9
   ;;
   source_host            = homer.sos
   source_protocol        = sftp
   source_port            = 22
   source_user            = test
   source_ssh_auth_method = publickey
   ;;* * * * * * * * * * * * * * * * *  * * *  * * * *
   ;;;*     id_rsa for test@homer.sos at Galadriel.sos    *
   ;;;* * * * * * * * * * * * * * * * *  * * *  * * * *
   source_ssh_auth_file   = /home/sos/.ssh/id_rsa
   source_dir             = /home/test/data/from_homer
   ;
   ;;
   target_dir             = /home/sos/data/to_galadrial
   target_host            = localhost
   target_protocol        = local
   ;
   [sos@galadriel config]$
   
   [sos@galadriel bin]$ /home/sos/sos-berlin.com/jade_client/jade_current/bin/jade.sh -settings=/home/sos/sos-berlin.com/jade_client/config/7200_jade_settings_zip_operation.ini  -profile=zip_wilma_to__Galadriel
   

Execute command line

[sos@galadriel bin]$ /home/sos/sos-berlin.com/jade_client/jade_current/bin/jade.sh -settings=/home/sos/sos-berlin.com/jade_client/config/7200_jade_settings_zip_operation.ini  -profile=zip_wilma_to__Galadriel