Use knife delete -y to delete nodes and clients. [1/1]

This makes delete_node in the chef jig actually work.

 .../barclamp_chef/app/models/barclamp_chef/jig.rb  |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Crowbar-Pull-ID: d2db791bc79b214779bf30f707f16247eade7358

Crowbar-Release: development