cmd_iter_no_block did not pass on tgt to get_iter_returns(). That makes the
saltmaster always query ALL minions with saltutil.find_job because
get_iter_returns default to tgt='*'.
Merge pull request #6296 from felskrone/cmditernoblock_pass_on_tgt

cmd_iter_no_block did not pass on tgt to get_iter_returns(). That makes ...