Improved 'detailed-status' for VIM/WIM/SDN suboperations

For any VIM/WIM/SDN operation using the '--wait' option,
the output has been retrieved from the following field:
'_admin.detailed-status'.
With the implementation of VIM/WIM/SDN 'suboperations',
there is a new status field, one for each operation:
'_admin.operations[current_operation]detailed-status'
To use this new status field, both LCM and NBI must support it:
https://osm.etsi.org/gerrit/#/c/7767 : LCM support for operations
https://osm.etsi.org/gerrit/#/c/7734

 : NBI support for current_operation

Change-Id: Id4f9b1c95f746666a254c4e20ab91b128c2569ff
Signed-off-by: kuuse <johan.kuuse@altran.com>