bugfixes:
  - Fixed ce_bgp,first the pattern to be searched is need to change, otherwise there is no data to be found.then after running a task with this module,it will not show 'changed' correctly.
  - Fixed ce_bgp_af,'changed' of module run result is not showed, however the module runs correctly,and updates commands if result is not correct.
  - Fixed ce_bgp_neighbor, find specify bgp as information, as number is necessary and so on.
  - Fixed ce_bgp_neighbor_af,update commands should be showed correctly, and xml for filter and edit are also re-factor as the software version upgrade and update.